diff --git a/README.md b/README.md
index a2eb058ae6..48e0de03af 100644
--- a/README.md
+++ b/README.md
@@ -8,14 +8,14 @@ like to get paid for your work, make sure you report the bug via a job on
 [Worklist.net](https://worklist.net).
 
 We're hiring! We're looking for skilled developers; 
-send your resume to hiring@highfidelity.io
+send your resume to hiring@highfidelity.com
 
 ##### Chat with us
 Come chat with us in [our Gitter](http://gitter.im/highfidelity/hifi) if you have any questions or just want to say hi!
 
 Documentation
 =========
-Documentation is available at [docs.highfidelity.io](http://docs.highfidelity.io), if something is missing, please suggest it via a new job on Worklist (add to the hifi-docs project).
+Documentation is available at [docs.highfidelity.com](http://docs.highfidelity.com), if something is missing, please suggest it via a new job on Worklist (add to the hifi-docs project).
 
 Build Instructions 
 =========
diff --git a/assignment-client/src/assets/AssetServer.cpp b/assignment-client/src/assets/AssetServer.cpp
index f5f83399d6..fad8ece7bf 100644
--- a/assignment-client/src/assets/AssetServer.cpp
+++ b/assignment-client/src/assets/AssetServer.cpp
@@ -77,6 +77,18 @@ void AssetServer::completeSetup() {
 
     auto assetServerObject = settingsObject[ASSET_SERVER_SETTINGS_KEY].toObject();
 
+    static const QString MAX_BANDWIDTH_OPTION = "max_bandwidth";
+    auto maxBandwidthValue = assetServerObject[MAX_BANDWIDTH_OPTION];
+    auto maxBandwidthFloat = maxBandwidthValue.toDouble(-1);
+
+    if (maxBandwidthFloat > 0.0) {
+        const int BYTES_PER_MEGABITS = (1024 * 1024) / 8;
+        int maxBandwidth = maxBandwidthFloat * BYTES_PER_MEGABITS;
+        nodeList->setConnectionMaxBandwidth(maxBandwidth);
+        qInfo() << "Set maximum bandwith per connection to" << maxBandwidthFloat << "Mb/s."
+                    " (" << maxBandwidth << "bytes/sec)";
+    }
+
     // get the path to the asset folder from the domain server settings
     static const QString ASSETS_PATH_OPTION = "assets_path";
     auto assetsJSONValue = assetServerObject[ASSETS_PATH_OPTION];
diff --git a/cmake/externals/oglplus/CMakeLists.txt b/cmake/externals/oglplus/CMakeLists.txt
index 43730129a0..089ee5bb95 100644
--- a/cmake/externals/oglplus/CMakeLists.txt
+++ b/cmake/externals/oglplus/CMakeLists.txt
@@ -4,7 +4,7 @@ string(TOUPPER ${EXTERNAL_NAME} EXTERNAL_NAME_UPPER)
 include(ExternalProject)
 ExternalProject_Add(
     ${EXTERNAL_NAME}
-    URL http://iweb.dl.sourceforge.net/project/oglplus/oglplus-0.63.x/oglplus-0.63.0.zip
+    URL http://hifi-public.s3.amazonaws.com/dependencies/oglplus-0.63.0.zip
     URL_MD5 de984ab245b185b45c87415c0e052135
     CONFIGURE_COMMAND ""
     BUILD_COMMAND ""
diff --git a/domain-server/resources/describe-settings.json b/domain-server/resources/describe-settings.json
index cde398e01f..80ee32efa1 100644
--- a/domain-server/resources/describe-settings.json
+++ b/domain-server/resources/describe-settings.json
@@ -186,6 +186,15 @@
           "help": "The path to the directory assets are stored in.<br/>If this path is relative, it will be relative to the application data directory.<br/>If you change this path you will need to manually copy any existing assets from the previous directory.",
           "default": "",
           "advanced": true
+        },
+        {
+          "name": "max_bandwidth",
+          "type": "double",
+          "label": "Max Bandwidth Per User",
+          "help": "The maximum upstream bandwidth each user can use (in Mb/s).",
+          "placeholder": "10.0",
+          "default": "",
+          "advanced": true
         }
       ]
     },
diff --git a/interface/src/Application.cpp b/interface/src/Application.cpp
index 7e88ea28dc..65a8f83871 100644
--- a/interface/src/Application.cpp
+++ b/interface/src/Application.cpp
@@ -239,11 +239,7 @@ class DeadlockWatchdogThread : public QThread {
 public:
     static const unsigned long HEARTBEAT_CHECK_INTERVAL_SECS = 1;
     static const unsigned long HEARTBEAT_UPDATE_INTERVAL_SECS = 1;
-#ifdef DEBUG
-    static const unsigned long MAX_HEARTBEAT_AGE_USECS = 600 * USECS_PER_SECOND;
-#else
     static const unsigned long MAX_HEARTBEAT_AGE_USECS = 10 * USECS_PER_SECOND;
-#endif
 
     // Set the heartbeat on launch
     DeadlockWatchdogThread() {
@@ -511,8 +507,8 @@ Application::Application(int& argc, char** argv, QElapsedTimer& startupTimer) :
     auto nodeList = DependencyManager::get<NodeList>();
 
     // Set up a watchdog thread to intentionally crash the application on deadlocks
-    auto deadlockWatchdog = new DeadlockWatchdogThread();
-    deadlockWatchdog->start();
+    _deadlockWatchdogThread = new DeadlockWatchdogThread();
+    _deadlockWatchdogThread->start();
 
     qCDebug(interfaceapp) << "[VERSION] Build sequence:" << qPrintable(applicationVersion());
 
@@ -586,7 +582,7 @@ Application::Application(int& argc, char** argv, QElapsedTimer& startupTimer) :
 
     ResourceManager::init();
     // Make sure we don't time out during slow operations at startup
-    deadlockWatchdog->updateHeartbeat();
+    updateHeartbeat();
 
     // Setup MessagesClient
     auto messagesClient = DependencyManager::get<MessagesClient>();
@@ -734,7 +730,7 @@ Application::Application(int& argc, char** argv, QElapsedTimer& startupTimer) :
     initializeGL();
     _offscreenContext->makeCurrent();
     // Make sure we don't time out during slow operations at startup
-    deadlockWatchdog->updateHeartbeat();
+    updateHeartbeat();
 
     // Tell our entity edit sender about our known jurisdictions
     _entityEditSender.setServerJurisdictions(&_entityServerJurisdictions);
@@ -746,7 +742,7 @@ Application::Application(int& argc, char** argv, QElapsedTimer& startupTimer) :
 
     _overlays.init(); // do this before scripts load
     // Make sure we don't time out during slow operations at startup
-    deadlockWatchdog->updateHeartbeat();
+    updateHeartbeat();
 
     connect(this, SIGNAL(aboutToQuit()), this, SLOT(aboutToQuit()));
 
@@ -900,11 +896,11 @@ Application::Application(int& argc, char** argv, QElapsedTimer& startupTimer) :
     // do this as late as possible so that all required subsystems are initialized
     scriptEngines->loadScripts();
     // Make sure we don't time out during slow operations at startup
-    deadlockWatchdog->updateHeartbeat();
+    updateHeartbeat();
 
     loadSettings();
     // Make sure we don't time out during slow operations at startup
-    deadlockWatchdog->updateHeartbeat();
+    updateHeartbeat();
 
     int SAVE_SETTINGS_INTERVAL = 10 * MSECS_PER_SECOND; // Let's save every seconds for now
     connect(&_settingsTimer, &QTimer::timeout, this, &Application::saveSettings);
@@ -1019,7 +1015,7 @@ Application::Application(int& argc, char** argv, QElapsedTimer& startupTimer) :
     });
 
     // Make sure we don't time out during slow operations at startup
-    deadlockWatchdog->updateHeartbeat();
+    updateHeartbeat();
 
     connect(this, &Application::applicationStateChanged, this, &Application::activeChanged);
     qCDebug(interfaceapp, "Startup time: %4.2f seconds.", (double)startupTimer.elapsed() / 1000.0);
@@ -1060,6 +1056,10 @@ void Application::showCursor(const QCursor& cursor) {
     _cursorNeedsChanging = true;
 }
 
+void Application::updateHeartbeat() {
+    static_cast<DeadlockWatchdogThread*>(_deadlockWatchdogThread)->updateHeartbeat();
+}
+
 void Application::aboutToQuit() {
     emit beforeAboutToQuit();
 
diff --git a/interface/src/Application.h b/interface/src/Application.h
index 4c12164a5f..3b906a7d17 100644
--- a/interface/src/Application.h
+++ b/interface/src/Application.h
@@ -271,6 +271,8 @@ public slots:
 
     void reloadResourceCaches();
 
+    void updateHeartbeat();
+
     void crashApplication();
     void deadlockApplication();
 
@@ -505,6 +507,8 @@ private:
     mutable QMutex _changeCursorLock { QMutex::Recursive };
     QCursor _desiredCursor{ Qt::BlankCursor };
     bool _cursorNeedsChanging { false };
+
+    QThread* _deadlockWatchdogThread;
 };
 
 #endif // hifi_Application_h
diff --git a/libraries/gl/src/gl/OffscreenQmlSurface.cpp b/libraries/gl/src/gl/OffscreenQmlSurface.cpp
index 563c590874..e224adad07 100644
--- a/libraries/gl/src/gl/OffscreenQmlSurface.cpp
+++ b/libraries/gl/src/gl/OffscreenQmlSurface.cpp
@@ -23,6 +23,7 @@
 #include <PerfStat.h>
 #include <DependencyManager.h>
 #include <NumericalConstants.h>
+#include <Finally.h>
 
 #include "OffscreenGLCanvas.h"
 #include "GLEscrow.h"
@@ -84,6 +85,7 @@ protected:
     Queue _queue;
     QMutex _mutex;
     QWaitCondition _waitCondition;
+    std::atomic<bool> _rendering { false };
 
 private:
     // Event-driven methods
@@ -214,22 +216,19 @@ void OffscreenQmlRenderThread::init() {
     connect(_renderControl, &QQuickRenderControl::sceneChanged, _surface, &OffscreenQmlSurface::requestUpdate);
 
     if (!_canvas.makeCurrent()) {
-        qWarning("Failed to make context current on render thread");
+        // Failed to make GL context current, this OffscreenQmlSurface is basically dead
+        qWarning("Failed to make context current on QML Renderer Thread");
         return;
     }
+
     _renderControl->initialize(_canvas.getContext());
     setupFbo();
     _escrow.setRecycler([this](GLuint texture){
         _textures.recycleTexture(texture);
     });
-    _canvas.doneCurrent();
 }
 
 void OffscreenQmlRenderThread::cleanup() {
-    if (!_canvas.makeCurrent()) {
-        qFatal("Failed to make context current on render thread");
-        return;
-    }
     _renderControl->invalidate();
 
     _fbo.reset();
@@ -237,7 +236,6 @@ void OffscreenQmlRenderThread::cleanup() {
     _textures.clear();
 
     _canvas.doneCurrent();
-
     _canvas.getContextObject()->moveToThread(QCoreApplication::instance()->thread());
 
     _quit = true;
@@ -245,57 +243,55 @@ void OffscreenQmlRenderThread::cleanup() {
 
 void OffscreenQmlRenderThread::resize() {
     // Lock _newSize changes
-    QMutexLocker locker(&_mutex);
+    {
+        QMutexLocker locker(&_mutex);
 
-    // Update our members
-    if (_quickWindow) {
-        _quickWindow->setGeometry(QRect(QPoint(), _newSize));
-        _quickWindow->contentItem()->setSize(_newSize);
+        // Update our members
+        if (_quickWindow) {
+            _quickWindow->setGeometry(QRect(QPoint(), _newSize));
+            _quickWindow->contentItem()->setSize(_newSize);
+        }
+
+        // Qt bug in 5.4 forces this check of pixel ratio,
+        // even though we're rendering offscreen.
+        qreal pixelRatio = 1.0;
+        if (_renderControl && _renderControl->_renderWindow) {
+            pixelRatio = _renderControl->_renderWindow->devicePixelRatio();
+        }
+
+        uvec2 newOffscreenSize = toGlm(_newSize * pixelRatio);
+        if (newOffscreenSize == _size) {
+            return;
+        }
+
+        qDebug() << "Offscreen UI resizing to " << _newSize.width() << "x" << _newSize.height() << " with pixel ratio " << pixelRatio;
+        _size = newOffscreenSize;
     }
 
-    // Qt bug in 5.4 forces this check of pixel ratio,
-    // even though we're rendering offscreen.
-    qreal pixelRatio = 1.0;
-    if (_renderControl && _renderControl->_renderWindow) {
-        pixelRatio = _renderControl->_renderWindow->devicePixelRatio();
-    }
-
-    uvec2 newOffscreenSize = toGlm(_newSize * pixelRatio);
-    _textures.setSize(newOffscreenSize);
-    if (newOffscreenSize == _size) {
-        return;
-    }
-    _size = newOffscreenSize;
-
-    // Clear out any fbos with the old size
-    if (!_canvas.makeCurrent()) {
-        qWarning("Failed to make context current on render thread");
-        return;
-    }
-
-    qDebug() << "Offscreen UI resizing to " << _newSize.width() << "x" << _newSize.height() << " with pixel ratio " << pixelRatio;
-
-    locker.unlock();
-
+    _textures.setSize(_size);
     setupFbo();
-    _canvas.doneCurrent();
 }
 
 void OffscreenQmlRenderThread::render() {
-    if (_surface->_paused) {
+    // Ensure we always release the main thread
+    Finally releaseMainThread([this] {
         _waitCondition.wakeOne();
+    });
+
+    if (_surface->_paused) {
         return;
     }
 
-    if (!_canvas.makeCurrent()) {
-        qWarning("Failed to make context current on render thread");
-        return;
-    }
+    _rendering = true;
+    Finally unmarkRenderingFlag([this] {
+        _rendering = false;
+    });
 
-    QMutexLocker locker(&_mutex);
-    _renderControl->sync();
-    _waitCondition.wakeOne();
-    locker.unlock();
+    {
+        QMutexLocker locker(&_mutex);
+        _renderControl->sync();
+        releaseMainThread.trigger();
+    }
 
     using namespace oglplus;
 
@@ -308,6 +304,7 @@ void OffscreenQmlRenderThread::render() {
         _fbo->AttachTexture(Framebuffer::Target::Draw, FramebufferAttachment::Color, *texture, 0);
         _fbo->Complete(Framebuffer::Target::Draw);
         {
+            PROFILE_RANGE("qml_render->rendercontrol")
             _renderControl->render();
             // FIXME The web browsers seem to be leaving GL in an error state.
             // Need a debug context with sync logging to figure out why.
@@ -338,10 +335,10 @@ OffscreenQmlSurface::~OffscreenQmlSurface() {
     QObject::disconnect(&_updateTimer);
     QObject::disconnect(qApp);
 
-    qDebug() << "Stopping QML render thread " << _renderer->currentThreadId();
+    qDebug() << "Stopping QML Renderer Thread " << _renderer->currentThreadId();
     _renderer->_queue.add(STOP);
     if (!_renderer->wait(MAX_SHUTDOWN_WAIT_SECS * USECS_PER_SECOND)) {
-        qWarning() << "Failed to shut down the QML render thread";
+        qWarning() << "Failed to shut down the QML Renderer Thread";
     }
 
     delete _rootItem;
@@ -396,8 +393,6 @@ void OffscreenQmlSurface::resize(const QSize& newSize_) {
                 std::max(static_cast<int>(scale * newSize.height()), 10));
     }
 
-
-
     QSize currentSize = _renderer->_quickWindow->geometry().size();
     if (newSize == currentSize) {
         return;
@@ -426,7 +421,11 @@ void OffscreenQmlSurface::setBaseUrl(const QUrl& baseUrl) {
 }
 
 QObject* OffscreenQmlSurface::load(const QUrl& qmlSource, std::function<void(QQmlContext*, QObject*)> f) {
-    _qmlComponent->loadUrl(qmlSource);
+    // Synchronous loading may take a while; restart the deadlock timer
+    QMetaObject::invokeMethod(qApp, "updateHeartbeat", Qt::DirectConnection);
+
+    _qmlComponent->loadUrl(qmlSource, QQmlComponent::PreferSynchronous);
+
     if (_qmlComponent->isLoading()) {
         connect(_qmlComponent, &QQmlComponent::statusChanged, this, 
             [this, f](QQmlComponent::Status){
@@ -504,7 +503,12 @@ QObject* OffscreenQmlSurface::finishQmlLoad(std::function<void(QQmlContext*, QOb
 }
 
 void OffscreenQmlSurface::updateQuick() {
-    if (!_renderer || !_renderer->allowNewFrame(_maxFps)) {
+    // If we're 
+    //   a) not set up
+    //   b) already rendering a frame
+    //   c) rendering too fast
+    // then skip this 
+    if (!_renderer || _renderer->_rendering || !_renderer->allowNewFrame(_maxFps)) {
         return;
     }
 
@@ -514,11 +518,11 @@ void OffscreenQmlSurface::updateQuick() {
     }
 
     if (_render) {
+        PROFILE_RANGE(__FUNCTION__);
         // Lock the GUI size while syncing
         QMutexLocker locker(&(_renderer->_mutex));
         _renderer->_queue.add(RENDER);
         _renderer->_waitCondition.wait(&(_renderer->_mutex));
-
         _render = false;
     }
 
diff --git a/libraries/gpu/src/gpu/Resource.cpp b/libraries/gpu/src/gpu/Resource.cpp
index 1788f6ece5..197263f392 100644
--- a/libraries/gpu/src/gpu/Resource.cpp
+++ b/libraries/gpu/src/gpu/Resource.cpp
@@ -10,11 +10,74 @@
 //
 #include "Resource.h"
 
+#include <atomic>
+
+#include <SharedUtil.h>
+#include <NumericalConstants.h>
 #include <QDebug>
 
 using namespace gpu;
 
+class AllocationDebugger {
+public:
+    void operator+=(size_t size) {
+        _allocatedMemory += size;
+        maybeReport();
+    }
+
+    void operator-=(size_t size) {
+        _allocatedMemory -= size;
+        maybeReport();
+    }
+
+private:
+    QString formatSize(size_t size) {
+        float num = size;
+        QStringList list;
+        list << "KB" << "MB" << "GB" << "TB";
+
+        QStringListIterator i(list);
+        QString unit("bytes");
+
+        while (num >= K && i.hasNext()) {
+            unit = i.next();
+            num /= K;
+        }
+        return QString().setNum(num, 'f', 2) + " " + unit;
+    }
+
+    void maybeReport() {
+        auto now = usecTimestampNow();
+        if (now - _lastReportTime < MAX_REPORT_FREQUENCY) {
+            return;
+        }
+        size_t current = _allocatedMemory;
+        size_t last = _lastReportedMemory;
+        size_t delta = (current > last) ? (current - last) : (last - current);
+        if (delta > MIN_REPORT_DELTA) {
+            _lastReportTime = now;
+            _lastReportedMemory = current;
+            qDebug() << "Total allocation " << formatSize(current);
+        }
+    }
+
+    std::atomic<size_t> _allocatedMemory;
+    std::atomic<size_t> _lastReportedMemory;
+    std::atomic<uint64_t> _lastReportTime;
+
+    static const float K;
+    // Report changes of 5 megabytes
+    static const size_t MIN_REPORT_DELTA = 1024 * 1024 * 5;
+    // Report changes no more frequently than every 15 seconds
+    static const uint64_t MAX_REPORT_FREQUENCY = USECS_PER_SECOND * 15;
+};
+
+const float AllocationDebugger::K = 1024.0f;
+
+static AllocationDebugger allocationDebugger;
+
 Resource::Size Resource::Sysmem::allocateMemory(Byte** dataAllocated, Size size) {
+    allocationDebugger += size;
     if ( !dataAllocated ) { 
         qWarning() << "Buffer::Sysmem::allocateMemory() : Must have a valid dataAllocated pointer.";
         return NOT_ALLOCATED;
@@ -38,6 +101,7 @@ Resource::Size Resource::Sysmem::allocateMemory(Byte** dataAllocated, Size size)
 }
 
 void Resource::Sysmem::deallocateMemory(Byte* dataAllocated, Size size) {
+    allocationDebugger -= size;
     if (dataAllocated) {
         delete[] dataAllocated;
     }
diff --git a/libraries/networking/src/LimitedNodeList.h b/libraries/networking/src/LimitedNodeList.h
index 43393ef69c..0cbe9668b3 100644
--- a/libraries/networking/src/LimitedNodeList.h
+++ b/libraries/networking/src/LimitedNodeList.h
@@ -219,6 +219,8 @@ public:
 
     udt::Socket::StatsVector sampleStatsForAllConnections() { return _nodeSocket.sampleStatsForAllConnections(); }
 
+    void setConnectionMaxBandwidth(int maxBandwidth) { _nodeSocket.setConnectionMaxBandwidth(maxBandwidth); }
+
 public slots:
     void reset();
     void eraseAllNodes();
diff --git a/libraries/networking/src/udt/CongestionControl.cpp b/libraries/networking/src/udt/CongestionControl.cpp
index bac178377e..1d1a6628fe 100644
--- a/libraries/networking/src/udt/CongestionControl.cpp
+++ b/libraries/networking/src/udt/CongestionControl.cpp
@@ -20,13 +20,19 @@ using namespace std::chrono;
 
 static const double USECS_PER_SECOND = 1000000.0;
 
+void CongestionControl::setMaxBandwidth(int maxBandwidth) {
+    _maxBandwidth = maxBandwidth;
+    setPacketSendPeriod(_packetSendPeriod);
+}
+
 void CongestionControl::setPacketSendPeriod(double newSendPeriod) {
     Q_ASSERT_X(newSendPeriod >= 0, "CongestionControl::setPacketPeriod", "Can not set a negative packet send period");
-    
-    if (_maxBandwidth > 0) {
+
+    auto maxBandwidth = _maxBandwidth.load();
+    if (maxBandwidth > 0) {
         // anytime the packet send period is about to be increased, make sure it stays below the minimum period,
         // calculated based on the maximum desired bandwidth
-        double minPacketSendPeriod = USECS_PER_SECOND / (((double) _maxBandwidth) / _mss);
+        double minPacketSendPeriod = USECS_PER_SECOND / (((double) maxBandwidth) / _mss);
         _packetSendPeriod = std::max(newSendPeriod, minPacketSendPeriod);
     } else {
         _packetSendPeriod = newSendPeriod;
@@ -39,7 +45,7 @@ DefaultCC::DefaultCC() :
     _mss = udt::MAX_PACKET_SIZE_WITH_UDP_HEADER;
     
     _congestionWindowSize = 16.0;
-    _packetSendPeriod = 1.0;
+    setPacketSendPeriod(1.0);
 }
 
 void DefaultCC::onACK(SequenceNumber ackNum) {
@@ -73,10 +79,10 @@ void DefaultCC::onACK(SequenceNumber ackNum) {
             
             if (_receiveRate > 0) {
                 // if we have a valid receive rate we set the send period to whatever the receive rate dictates
-                _packetSendPeriod = USECS_PER_SECOND / _receiveRate;
+                setPacketSendPeriod(USECS_PER_SECOND / _receiveRate);
             } else {
                 // no valid receive rate, packet send period is dictated by estimated RTT and current congestion window size
-                _packetSendPeriod = (_rtt + synInterval()) / _congestionWindowSize;
+                setPacketSendPeriod((_rtt + synInterval()) / _congestionWindowSize);
             }
         }
     } else {
@@ -148,8 +154,8 @@ void DefaultCC::onLoss(SequenceNumber rangeStart, SequenceNumber rangeEnd) {
     if (rangeStart > _lastDecreaseMaxSeq) {
 
         _lastDecreasePeriod = _packetSendPeriod;
-
-        _packetSendPeriod = ceil(_packetSendPeriod * INTER_PACKET_ARRIVAL_INCREASE);
+        
+        setPacketSendPeriod(ceil(_packetSendPeriod * INTER_PACKET_ARRIVAL_INCREASE));
 
         // use EWMA to update the average number of NAKs per congestion
         static const double NAK_EWMA_ALPHA = 0.125;
@@ -175,7 +181,7 @@ void DefaultCC::onLoss(SequenceNumber rangeStart, SequenceNumber rangeEnd) {
         // there have been fewer than MAX_DECREASES_PER_CONGESTION_EPOCH AND this NAK matches the random count at which we
         // decided we would decrease the packet send period
         
-        _packetSendPeriod = ceil(_packetSendPeriod * INTER_PACKET_ARRIVAL_INCREASE);
+        setPacketSendPeriod(ceil(_packetSendPeriod * INTER_PACKET_ARRIVAL_INCREASE));
         _lastDecreaseMaxSeq = _sendCurrSeqNum;
     }
 }
@@ -198,12 +204,12 @@ void DefaultCC::stopSlowStart() {
     
     if (_receiveRate > 0) {
         // Set the sending rate to the receiving rate.
-        _packetSendPeriod = USECS_PER_SECOND / _receiveRate;
+        setPacketSendPeriod(USECS_PER_SECOND / _receiveRate);
     } else {
         // If no receiving rate is observed, we have to compute the sending
         // rate according to the current window size, and decrease it
         // using the method below.
-        _packetSendPeriod = _congestionWindowSize / (_rtt + synInterval());
+        setPacketSendPeriod(_congestionWindowSize / (_rtt + synInterval()));
     }
 }
 
diff --git a/libraries/networking/src/udt/CongestionControl.h b/libraries/networking/src/udt/CongestionControl.h
index 3a5c8d0d00..8297b5f6bd 100644
--- a/libraries/networking/src/udt/CongestionControl.h
+++ b/libraries/networking/src/udt/CongestionControl.h
@@ -12,6 +12,7 @@
 #ifndef hifi_CongestionControl_h
 #define hifi_CongestionControl_h
 
+#include <atomic>
 #include <memory>
 #include <vector>
 #include <memory>
@@ -37,6 +38,7 @@ public:
     virtual ~CongestionControl() {}
     
     int synInterval() const { return _synInterval; }
+    void setMaxBandwidth(int maxBandwidth);
 
     virtual void init() {}
     virtual void onACK(SequenceNumber ackNum) {}
@@ -49,7 +51,6 @@ protected:
     void setMSS(int mss) { _mss = mss; }
     void setMaxCongestionWindowSize(int window) { _maxCongestionWindowSize = window; }
     void setBandwidth(int bandwidth) { _bandwidth = bandwidth; }
-    void setMaxBandwidth(int maxBandwidth) { _maxBandwidth = maxBandwidth; }
     virtual void setInitialSendSequenceNumber(SequenceNumber seqNum) = 0;
     void setSendCurrentSequenceNumber(SequenceNumber seqNum) { _sendCurrSeqNum = seqNum; }
     void setReceiveRate(int rate) { _receiveRate = rate; }
@@ -60,7 +61,7 @@ protected:
     double _congestionWindowSize { 16.0 }; // Congestion window size, in packets
     
     int _bandwidth { 0 }; // estimated bandwidth, packets per second
-    int _maxBandwidth { -1 }; // Maximum desired bandwidth, packets per second
+    std::atomic<int> _maxBandwidth { -1 }; // Maximum desired bandwidth, bytes per second
     double _maxCongestionWindowSize { 0.0 }; // maximum cwnd size, in packets
     
     int _mss { 0 }; // Maximum Packet Size, including all packet headers
diff --git a/libraries/networking/src/udt/Connection.cpp b/libraries/networking/src/udt/Connection.cpp
index f75a9535f5..e5f3508b81 100644
--- a/libraries/networking/src/udt/Connection.cpp
+++ b/libraries/networking/src/udt/Connection.cpp
@@ -80,6 +80,10 @@ void Connection::resetRTT() {
     _rttVariance = _rtt / 2;
 }
 
+void Connection::setMaxBandwidth(int maxBandwidth) {
+    _congestionControl->setMaxBandwidth(maxBandwidth);
+}
+
 SendQueue& Connection::getSendQueue() {
     if (!_sendQueue) {
 
diff --git a/libraries/networking/src/udt/Connection.h b/libraries/networking/src/udt/Connection.h
index 8d80e736af..4f5a8793e7 100644
--- a/libraries/networking/src/udt/Connection.h
+++ b/libraries/networking/src/udt/Connection.h
@@ -76,6 +76,8 @@ public:
 
     HifiSockAddr getDestination() const { return _destination; }
 
+    void setMaxBandwidth(int maxBandwidth);
+
 signals:
     void packetSent();
     void connectionInactive(const HifiSockAddr& sockAddr);
diff --git a/libraries/networking/src/udt/Socket.cpp b/libraries/networking/src/udt/Socket.cpp
index 1eb7c04331..e9af1577fb 100644
--- a/libraries/networking/src/udt/Socket.cpp
+++ b/libraries/networking/src/udt/Socket.cpp
@@ -176,7 +176,9 @@ Connection& Socket::findOrCreateConnection(const HifiSockAddr& sockAddr) {
     auto it = _connectionsHash.find(sockAddr);
 
     if (it == _connectionsHash.end()) {
-        auto connection = std::unique_ptr<Connection>(new Connection(this, sockAddr, _ccFactory->create()));
+        auto congestionControl = _ccFactory->create();
+        congestionControl->setMaxBandwidth(_maxBandwidth);
+        auto connection = std::unique_ptr<Connection>(new Connection(this, sockAddr, std::move(congestionControl)));
         
         // we queue the connection to cleanup connection in case it asks for it during its own rate control sync
         QObject::connect(connection.get(), &Connection::connectionInactive, this, &Socket::cleanupConnection);
@@ -350,6 +352,17 @@ void Socket::setCongestionControlFactory(std::unique_ptr<CongestionControlVirtua
     _synInterval = _ccFactory->synInterval();
 }
 
+
+void Socket::setConnectionMaxBandwidth(int maxBandwidth) {
+    qInfo() << "Setting socket's maximum bandwith to" << maxBandwidth << ". ("
+            << _connectionsHash.size() << "live connections)";
+    _maxBandwidth = maxBandwidth;
+    for (auto& pair : _connectionsHash) {
+        auto& connection = pair.second;
+        connection->setMaxBandwidth(_maxBandwidth);
+    }
+}
+
 ConnectionStats::Stats Socket::sampleStatsForConnection(const HifiSockAddr& destination) {
     auto it = _connectionsHash.find(destination);
     if (it != _connectionsHash.end()) {
diff --git a/libraries/networking/src/udt/Socket.h b/libraries/networking/src/udt/Socket.h
index 88db8e3d86..424158045f 100644
--- a/libraries/networking/src/udt/Socket.h
+++ b/libraries/networking/src/udt/Socket.h
@@ -72,6 +72,7 @@ public:
         { _unfilteredHandlers[senderSockAddr] = handler; }
     
     void setCongestionControlFactory(std::unique_ptr<CongestionControlVirtualFactory> ccFactory);
+    void setConnectionMaxBandwidth(int maxBandwidth);
 
     void messageReceived(std::unique_ptr<Packet> packet);
     void messageFailed(Connection* connection, Packet::MessageNumber messageNumber);
@@ -109,8 +110,10 @@ private:
     std::unordered_map<HifiSockAddr, SequenceNumber> _unreliableSequenceNumbers;
     std::unordered_map<HifiSockAddr, std::unique_ptr<Connection>> _connectionsHash;
     
-    int _synInterval = 10; // 10ms
-    QTimer* _synTimer;
+    int _synInterval { 10 }; // 10ms
+    QTimer* _synTimer { nullptr };
+
+    int _maxBandwidth { -1 };
     
     std::unique_ptr<CongestionControlVirtualFactory> _ccFactory { new CongestionControlFactory<DefaultCC>() };
     
diff --git a/libraries/render-utils/src/Model.cpp b/libraries/render-utils/src/Model.cpp
index df186802f6..0a483914df 100644
--- a/libraries/render-utils/src/Model.cpp
+++ b/libraries/render-utils/src/Model.cpp
@@ -29,7 +29,7 @@
 
 using namespace std;
 
-static int modelPointerTypeId = qRegisterMetaType<QPointer<Model> >();
+static int nakedModelPointerTypeId = qRegisterMetaType<ModelPointer>();
 static int weakNetworkGeometryPointerTypeId = qRegisterMetaType<QWeakPointer<NetworkGeometry> >();
 static int vec3VectorTypeId = qRegisterMetaType<QVector<glm::vec3> >();
 float Model::FAKE_DIMENSION_PLACEHOLDER = -1.0f;
@@ -821,21 +821,21 @@ QStringList Model::getJointNames() const {
 class Blender : public QRunnable {
 public:
 
-    Blender(Model* model, int blendNumber, const QWeakPointer<NetworkGeometry>& geometry,
+    Blender(ModelPointer model, int blendNumber, const QWeakPointer<NetworkGeometry>& geometry,
         const QVector<FBXMesh>& meshes, const QVector<float>& blendshapeCoefficients);
 
     virtual void run();
 
 private:
 
-    QPointer<Model> _model;
+    ModelPointer _model;
     int _blendNumber;
     QWeakPointer<NetworkGeometry> _geometry;
     QVector<FBXMesh> _meshes;
     QVector<float> _blendshapeCoefficients;
 };
 
-Blender::Blender(Model* model, int blendNumber, const QWeakPointer<NetworkGeometry>& geometry,
+Blender::Blender(ModelPointer model, int blendNumber, const QWeakPointer<NetworkGeometry>& geometry,
         const QVector<FBXMesh>& meshes, const QVector<float>& blendshapeCoefficients) :
     _model(model),
     _blendNumber(blendNumber),
@@ -847,7 +847,7 @@ Blender::Blender(Model* model, int blendNumber, const QWeakPointer<NetworkGeomet
 void Blender::run() {
     PROFILE_RANGE(__FUNCTION__);
     QVector<glm::vec3> vertices, normals;
-    if (!_model.isNull()) {
+    if (_model) {
         int offset = 0;
         foreach (const FBXMesh& mesh, _meshes) {
             if (mesh.blendshapes.isEmpty()) {
@@ -877,7 +877,7 @@ void Blender::run() {
     }
     // post the result to the geometry cache, which will dispatch to the model if still alive
     QMetaObject::invokeMethod(DependencyManager::get<ModelBlender>().data(), "setBlendedVertices",
-        Q_ARG(const QPointer<Model>&, _model), Q_ARG(int, _blendNumber),
+        Q_ARG(ModelPointer, _model), Q_ARG(int, _blendNumber),
         Q_ARG(const QWeakPointer<NetworkGeometry>&, _geometry), Q_ARG(const QVector<glm::vec3>&, vertices),
         Q_ARG(const QVector<glm::vec3>&, normals));
 }
@@ -1088,7 +1088,7 @@ float Model::getLimbLength(int jointIndex) const {
 bool Model::maybeStartBlender() {
     const FBXGeometry& fbxGeometry = _geometry->getFBXGeometry();
     if (fbxGeometry.hasBlendedMeshes()) {
-        QThreadPool::globalInstance()->start(new Blender(this, ++_blendNumber, _geometry,
+        QThreadPool::globalInstance()->start(new Blender(getThisPointer(), ++_blendNumber, _geometry,
             fbxGeometry.meshes, _blendshapeCoefficients));
         return true;
     }
@@ -1284,10 +1284,9 @@ void ModelBlender::noteRequiresBlend(ModelPointer model) {
     }
 }
 
-void ModelBlender::setBlendedVertices(const QPointer<Model>& model, int blendNumber,
+void ModelBlender::setBlendedVertices(ModelPointer model, int blendNumber,
         const QWeakPointer<NetworkGeometry>& geometry, const QVector<glm::vec3>& vertices, const QVector<glm::vec3>& normals) {
-
-    if (!model.isNull()) {
+    if (model) {
         model->setBlendedVertices(blendNumber, geometry, vertices, normals);
     }
     _pendingBlenders--;
diff --git a/libraries/render-utils/src/Model.h b/libraries/render-utils/src/Model.h
index 53ed82f418..4e51dc4f33 100644
--- a/libraries/render-utils/src/Model.h
+++ b/libraries/render-utils/src/Model.h
@@ -384,7 +384,7 @@ protected:
     RigPointer _rig;
 };
 
-Q_DECLARE_METATYPE(QPointer<Model>)
+Q_DECLARE_METATYPE(ModelPointer)
 Q_DECLARE_METATYPE(QWeakPointer<NetworkGeometry>)
 
 /// Handle management of pending models that need blending
@@ -398,7 +398,7 @@ public:
     void noteRequiresBlend(ModelPointer model);
 
 public slots:
-    void setBlendedVertices(const QPointer<Model>& model, int blendNumber, const QWeakPointer<NetworkGeometry>& geometry,
+    void setBlendedVertices(ModelPointer model, int blendNumber, const QWeakPointer<NetworkGeometry>& geometry,
         const QVector<glm::vec3>& vertices, const QVector<glm::vec3>& normals);
 
 private:
diff --git a/libraries/script-engine/src/ScriptEngine.cpp b/libraries/script-engine/src/ScriptEngine.cpp
index 61ebfe4515..3f403b3677 100644
--- a/libraries/script-engine/src/ScriptEngine.cpp
+++ b/libraries/script-engine/src/ScriptEngine.cpp
@@ -158,6 +158,13 @@ void ScriptEngine::disconnectNonEssentialSignals() {
 }
 
 void ScriptEngine::runInThread() {
+    Q_ASSERT_X(!_isThreaded, "ScriptEngine::runInThread()", "runInThread should not be called more than once");
+
+    if (_isThreaded) {
+        qCWarning(scriptengine) << "ScriptEngine already running in thread: " << getFilename();
+        return;
+    }
+
     _isThreaded = true;
     QThread* workerThread = new QThread(); // thread is not owned, so we need to manage the delete
     QString scriptEngineName = QString("Script Thread:") + getFilename();
diff --git a/libraries/shared/src/Finally.h b/libraries/shared/src/Finally.h
index 59e8be0228..9070d49647 100644
--- a/libraries/shared/src/Finally.h
+++ b/libraries/shared/src/Finally.h
@@ -20,6 +20,10 @@ public:
     template <typename F>
     Finally(F f) : _f(f) {}
     ~Finally() { _f(); }
+    void trigger() {
+        _f();
+        _f = [] {};
+    }
 private:
     std::function<void()> _f;
 };
diff --git a/libraries/shared/src/LogHandler.cpp b/libraries/shared/src/LogHandler.cpp
index a338dfe8c2..b67c86ecef 100644
--- a/libraries/shared/src/LogHandler.cpp
+++ b/libraries/shared/src/LogHandler.cpp
@@ -82,7 +82,6 @@ void LogHandler::flushRepeatedMessages() {
 }
 
 QString LogHandler::printMessage(LogMsgType type, const QMessageLogContext& context, const QString& message) {
-
     if (message.isEmpty()) {
         return QString();
     }
diff --git a/libraries/ui/src/QmlWindowClass.cpp b/libraries/ui/src/QmlWindowClass.cpp
index e986ea0441..679e86f4ae 100644
--- a/libraries/ui/src/QmlWindowClass.cpp
+++ b/libraries/ui/src/QmlWindowClass.cpp
@@ -114,7 +114,6 @@ QScriptValue QmlWindowClass::internalConstructor(const QString& qmlSource,
         }
     } else {
         auto argumentObject = context->argument(0);
-        qDebug() << argumentObject.toString();
         if (!argumentObject.property(TITLE_PROPERTY).isUndefined()) {
             title = argumentObject.property(TITLE_PROPERTY).toString();
         }