diff --git a/frameplaybackwindow.cpp b/frameplaybackwindow.cpp
index da46ac2..f2f631d 100644
--- a/frameplaybackwindow.cpp
+++ b/frameplaybackwindow.cpp
@@ -4,6 +4,7 @@
 #include <QFileDialog>
 #include <QMenu>
 #include <QSettings>
+#include "connections/canconmanager.h"
 
 /*
  * Notes about new functionality:
@@ -24,10 +25,10 @@ FramePlaybackWindow::FramePlaybackWindow(const QVector<CANFrame> *frames, QWidge
 {
     ui->setupUi(this);
 
-    ui->comboCANBus->addItem(tr("None"));
-    ui->comboCANBus->addItem(tr("0"));
-    ui->comboCANBus->addItem(tr("1"));
-    ui->comboCANBus->addItem(tr("Both"));
+
+    int numBuses = CANConManager::getInstance()->getNumBuses();
+    for (int n = 0; n < numBuses; n++) ui->comboCANBus->addItem(QString::number(n));
+    ui->comboCANBus->addItem(tr("All"));
     ui->comboCANBus->addItem(tr("From File"));
 
     readSettings();
@@ -399,7 +400,7 @@ void FramePlaybackWindow::btnBackOneClick()
     playbackActive = false;
 
     updatePosition(false);
-    emit sendFrameBatch(&sendingBuffer);
+    CANConManager::getInstance()->sendFrames(sendingBuffer);
 }
 
 void FramePlaybackWindow::btnPauseClick()
@@ -450,7 +451,7 @@ void FramePlaybackWindow::btnFwdOneClick()
     playbackTimer->stop();
     playbackActive = false;
     updatePosition(true);
-    emit sendFrameBatch(&sendingBuffer);
+    CANConManager::getInstance()->sendFrames(sendingBuffer);
 }
 
 void FramePlaybackWindow::changePlaybackSpeed(int newSpeed)
@@ -465,8 +466,6 @@ void FramePlaybackWindow::changeLooping(bool check)
 
 void FramePlaybackWindow::changeSendingBus(int newIdx)
 {
-    //falls out neatly this way. 0 = no sending, 1 = bus 0, 2 = bus 1, 3 = both, 4 = from file
-    //the index is exactly the same as the whichSendBus bitfield.
     whichBusSend = newIdx;
 }
 
@@ -516,7 +515,7 @@ void FramePlaybackWindow::timerTriggered()
             updatePosition(false);
         }
     }
-    emit sendFrameBatch(&sendingBuffer);
+    CANConManager::getInstance()->sendFrames(sendingBuffer);
 }
 
 void FramePlaybackWindow::updatePosition(bool forward)
@@ -590,23 +589,25 @@ void FramePlaybackWindow::updatePosition(bool forward)
     int originalBus = thisFrame->bus;
     if (currentSeqItem->idFilters.find(thisFrame->ID).value())
     {
-        //index 0 is none, 1 is Bus 0, 2 is bus 1, 3 is both, 4 is from file
-        if (whichBusSend & 4)
+        if (whichBusSend < ui->comboCANBus->count() - 2)
+        {
+            thisFrame->bus = whichBusSend;
+            sendingBuffer.append(*thisFrame);
+        }
+        else if (whichBusSend = ui->comboCANBus->count() - 2)  //all
+        {
+            for (int c = 0; c < ui->comboCANBus->count() - 2; c++)
+            {
+                thisFrame->bus = c;
+                sendingBuffer.append(*thisFrame);
+            }
+        }
+        else //from file so retain original bus and send as-is
         {
             sendingBuffer.append(*thisFrame);
         }
-        if (whichBusSend & 1)
-        {
-            thisFrame->bus = 0;
-            sendingBuffer.append(*thisFrame);
-        }
-        if (whichBusSend & 2)
-        {
-            thisFrame->bus = 1;
-            sendingBuffer.append(*thisFrame);
-        }
+
         thisFrame->bus = originalBus;
         updateFrameLabel();
     }
-
 }
diff --git a/frameplaybackwindow.h b/frameplaybackwindow.h
index 2c82753..af3e5e2 100644
--- a/frameplaybackwindow.h
+++ b/frameplaybackwindow.h
@@ -53,10 +53,6 @@ private slots:
     void saveFilters();
     void loadFilters();
 
-signals:
-    void sendCANFrame(const CANFrame *);
-    void sendFrameBatch(const QList<CANFrame> *);
-
 private:
     Ui::FramePlaybackWindow *ui;
     QList<int> foundID;
diff --git a/framesenderwindow.cpp b/framesenderwindow.cpp
index e5b722c..77b3490 100644
--- a/framesenderwindow.cpp
+++ b/framesenderwindow.cpp
@@ -5,6 +5,7 @@
 #include <QFileDialog>
 #include <QDebug>
 #include "mainwindow.h"
+#include "connections/canconmanager.h"
 
 /*
  * notes: need to ensure that you grab pointers when modifying data structures and dont
@@ -151,7 +152,7 @@ void FrameSenderWindow::processIncomingFrame(CANFrame *frame)
                             sendingData[sd].count++;
                             doModifiers(sd);
                             updateGridRow(sd);
-                            sendCANFrame(&sendingData[sd]);
+                            CANConManager::getInstance()->sendFrame(sendingData[sd]);
                         }
                         else //delayed sending frame
                         {
@@ -354,7 +355,7 @@ void FrameSenderWindow::handleTick()
                 doModifiers(i);
                 updateGridRow(i);
                 qDebug() << "About to try to send a frame";
-                emit sendCANFrame(&sendingData[i]);
+                CANConManager::getInstance()->sendFrame(sendingData[i]);
                 if (trigger->ID > 0) trigger->readyCount = false; //reset flag if this is a timed ID trigger
             }
         }
diff --git a/framesenderwindow.h b/framesenderwindow.h
index 5560e9e..57642e8 100644
--- a/framesenderwindow.h
+++ b/framesenderwindow.h
@@ -30,9 +30,6 @@ private slots:
     void loadGrid();
     void updatedFrames(int);
 
-signals:
-    void sendCANFrame(const CANFrame *);
-
 private:
     Ui::FrameSenderWindow *ui;
     QList<FrameSendData> sendingData;
diff --git a/mainwindow.cpp b/mainwindow.cpp
index 802d571..53f3e0b 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -863,8 +863,6 @@ void MainWindow::showFrameSenderWindow()
             frameSenderWindow = new FrameSenderWindow(model->getListReference());
         else
             frameSenderWindow = new FrameSenderWindow(model->getFilteredListReference());
-
-        //connect(frameSenderWindow, &FrameSenderWindow::sendCANFrame, connectionWindow, &ConnectionWindow::sendFrame);
     }
     frameSenderWindow->show();
 }
@@ -877,9 +875,6 @@ void MainWindow::showPlaybackWindow()
             playbackWindow = new FramePlaybackWindow(model->getListReference());
         else
             playbackWindow = new FramePlaybackWindow(model->getFilteredListReference());
-
-        //connect(playbackWindow, SIGNAL(sendCANFrame(const CANFrame*)), connectionWindow, SLOT(sendFrame(const CANFrame*)), Qt::QueuedConnection);
-        //connect(playbackWindow, SIGNAL(sendFrameBatch(const QList<CANFrame>*)), connectionWindow, SLOT(sendFrameBatch(const QList<CANFrame>*)), Qt::QueuedConnection);
     }
     playbackWindow->show();
 }
@@ -927,7 +922,6 @@ void MainWindow::showUDSScanWindow()
     if (!udsScanWindow)
     {
         udsScanWindow = new UDSScanWindow(model->getListReference());
-        //connect(udsScanWindow, SIGNAL(sendCANFrame(const CANFrame*,int)), connectionWindow, SLOT(sendFrame(const CANFrame*)));
     }
     udsScanWindow->show();
 }
diff --git a/scriptcontainer.h b/scriptcontainer.h
index 75caec2..241ac23 100644
--- a/scriptcontainer.h
+++ b/scriptcontainer.h
@@ -32,9 +32,6 @@ public slots:
 private slots:
     void tick();
 
-signals:
-    void sendCANFrame(const CANFrame *);
-
 private:
     QJSEngine scriptEngine;
     QJSValue compiledScript;
diff --git a/scriptingwindow.h b/scriptingwindow.h
index 6713460..38519d9 100644
--- a/scriptingwindow.h
+++ b/scriptingwindow.h
@@ -40,8 +40,6 @@ private:
     QList<ScriptContainer *> scripts;
     ScriptContainer *currentScript;
     const QVector<CANFrame> *modelFrames;
-
-
 };
 
 #endif // SCRIPTINGWINDOW_H
diff --git a/udsscanwindow.cpp b/udsscanwindow.cpp
index a4c4f6c..174a65c 100644
--- a/udsscanwindow.cpp
+++ b/udsscanwindow.cpp
@@ -1,6 +1,7 @@
 #include "udsscanwindow.h"
 #include "ui_udsscanwindow.h"
 #include "mainwindow.h"
+#include "connections/canconmanager.h"
 
 UDSScanWindow::UDSScanWindow(const QVector<CANFrame> *frames, QWidget *parent) :
     QDialog(parent),
@@ -20,10 +21,9 @@ UDSScanWindow::UDSScanWindow(const QVector<CANFrame> *frames, QWidget *parent) :
     connect(ui->btnScan, &QPushButton::clicked, this, &UDSScanWindow::scanUDS);
     connect(waitTimer, &QTimer::timeout, this, &UDSScanWindow::timeOut);
 
-    ui->cbBuses->addItem("0");
-    ui->cbBuses->addItem("1");
-    ui->cbBuses->addItem("Both");
-
+    int numBuses = CANConManager::getInstance()->getNumBuses();
+    for (int n = 0; n < numBuses; n++) ui->cbBuses->addItem(QString::number(n));
+    ui->cbBuses->addItem(tr("All"));
 }
 
 UDSScanWindow::~UDSScanWindow()
@@ -53,8 +53,6 @@ void UDSScanWindow::scanUDS()
     endID = Utility::ParseStringToNum(ui->txtEndID->text());
 
     int buses = ui->cbBuses->currentIndex();
-    buses++;
-    if (buses < 1) buses = 1;
 
     //start out by sending tester present to every address to see if anyone replies
     for (id = startID; id <= endID; id++)
@@ -68,16 +66,20 @@ void UDSScanWindow::scanUDS()
         frame.data[3] = 0;frame.data[4] = 0;frame.data[5] = 0;
         frame.data[6] = 0;frame.data[7] = 0;
 
-        if (buses & 1)
+        if (buses < ui->cbBuses->count()- 1)
         {
-            frame.bus = 0;
+            frame.bus = buses;
             sendingFrames.append(frame);
         }
-        if (buses & 2)
+        else
         {
-            frame.bus = 1;
-            sendingFrames.append(frame);
+            for (int c = 0; c < ui->cbBuses->count() - 1; c++)
+            {
+                frame.bus = c;
+                sendingFrames.append(frame);
+            }
         }
+
     }
 
     //then try asking for the various diagnostic session types
@@ -94,15 +96,18 @@ void UDSScanWindow::scanUDS()
             frame.data[3] = 0;frame.data[4] = 0;frame.data[5] = 0;
             frame.data[6] = 0;frame.data[7] = 0;
 
-            if (buses & 1)
+            if (buses < ui->cbBuses->count()- 1)
             {
-                frame.bus = 0;
+                frame.bus = buses;
                 sendingFrames.append(frame);
             }
-            if (buses & 2)
+            else
             {
-                frame.bus = 1;
-                sendingFrames.append(frame);
+                for (int c = 0; c < ui->cbBuses->count() - 1; c++)
+                {
+                    frame.bus = c;
+                    sendingFrames.append(frame);
+                }
             }
         }
     }
@@ -129,6 +134,7 @@ void UDSScanWindow::updatedFrames(int numFrames)
 }
 
 //Updates here are nearly once per millisecond if there is heavy traffic. That's more like it!
+//TODO: I really doubt this works anymore with the new connection system. This breaks the UDS scanner for now! ;(
 void UDSScanWindow::rapidFrames(int numFrames)
 {
     CANFrame thisFrame;
@@ -210,7 +216,7 @@ void UDSScanWindow::sendNextMsg()
     currIdx++;
     if (currIdx < sendingFrames.count())
     {
-        emit sendCANFrame(&sendingFrames[currIdx]);
+        CANConManager::getInstance()->sendFrame(sendingFrames[currIdx]);
         waitTimer->start();
     }
     else
diff --git a/udsscanwindow.h b/udsscanwindow.h
index c53114b..4039345 100644
--- a/udsscanwindow.h
+++ b/udsscanwindow.h
@@ -17,9 +17,6 @@ public:
     explicit UDSScanWindow(const QVector<CANFrame> *frames, QWidget *parent = 0);
     ~UDSScanWindow();
 
-signals:
-    void sendCANFrame(const CANFrame *);
-
 private slots:
     void updatedFrames(int numFrames);
     void rapidFrames(int numFrames);