diff --git a/canframemodel.cpp b/canframemodel.cpp
index 04b3f85..71c9b74 100644
--- a/canframemodel.cpp
+++ b/canframemodel.cpp
@@ -260,13 +260,29 @@ void CANFrameModel::clearFrames()
     mutex.unlock();
 }
 
-//Is this safe? Maybe not but if we don't change it then that's OK
-//Is it the best C++ practice? Probably not. This breaks the MVC paradigm
-//but, it's for a good cause.
-//Implement proper "const"ness for this function. No one should be
-//adding frames via this reference. Unfortunately, I've done just that in
-//places like the file loading code.
-QVector<CANFrame>* CANFrameModel::getListReference()
+/*
+ * Since the getListReference function returns readonly
+ * you can't insert frames with it. Instead this function
+ * allows for a mass import of frames into the model
+ */
+void CANFrameModel::insertFrames(const QVector<CANFrame> &newFrames)
+{
+    beginInsertRows(QModelIndex(), frames.count() + 1, frames.count() + newFrames.count());
+    for (int i = 0; i < newFrames.count(); i++)
+    {
+        frames.append(newFrames[i]);
+    }
+    endInsertRows();
+}
+
+/*
+ *This used to not be const correct but it is now. So, there's little harm in
+ * allowing external code to peek at our frames. There's just no touching.
+ * This ability to get a direct read-only reference speeds up a variety of
+ * external code that needs to access frames directly and doesn't care about
+ * this model's normal output mechanism.
+ */
+const QVector<CANFrame>* CANFrameModel::getListReference() const
 {
     return &frames;
 }
diff --git a/canframemodel.h b/canframemodel.h
index 2fab8ab..5378243 100644
--- a/canframemodel.h
+++ b/canframemodel.h
@@ -31,7 +31,8 @@ public:
     void setOverwriteMode(bool);
     void normalizeTiming();
     void recalcOverwrite();
-    QVector<CANFrame> *getListReference();
+    void insertFrames(const QVector<CANFrame> &newFrames);
+    const QVector<CANFrame> *getListReference() const; //thou shalt not modify these frames externally!
 
 
 private:
diff --git a/config.h b/config.h
index 35cc4d5..35d9393 100644
--- a/config.h
+++ b/config.h
@@ -1,7 +1,7 @@
 #ifndef CONFIG
 #define CONFIG
 
-#define VERSION 114
+#define VERSION 115
 
 #endif // CONFIG
 
diff --git a/flowviewwindow.cpp b/flowviewwindow.cpp
index 40e14da..f2879fa 100644
--- a/flowviewwindow.cpp
+++ b/flowviewwindow.cpp
@@ -6,7 +6,7 @@ const QColor FlowViewWindow::graphColors[8] = {Qt::blue, Qt::green, Qt::black, Q
                                                Qt::gray, Qt::yellow, Qt::cyan, Qt::darkMagenta}; //4 5 6 7
 
 
-FlowViewWindow::FlowViewWindow(QVector<CANFrame> *frames, QWidget *parent) :
+FlowViewWindow::FlowViewWindow(const QVector<CANFrame> *frames, QWidget *parent) :
     QDialog(parent),
     ui(new Ui::FlowViewWindow)
 {
diff --git a/flowviewwindow.h b/flowviewwindow.h
index 248a557..b1301f4 100644
--- a/flowviewwindow.h
+++ b/flowviewwindow.h
@@ -13,7 +13,7 @@ class FlowViewWindow : public QDialog
     Q_OBJECT
 
 public:
-    explicit FlowViewWindow(QVector<CANFrame> *frames, QWidget *parent = 0);
+    explicit FlowViewWindow(const QVector<CANFrame> *frames, QWidget *parent = 0);
     ~FlowViewWindow();
     void showEvent(QShowEvent*);
 
@@ -38,7 +38,7 @@ private:
     Ui::FlowViewWindow *ui;
     QList<int> foundID;
     QList<CANFrame> frameCache;
-    QVector<CANFrame> *modelFrames;
+    const QVector<CANFrame> *modelFrames;
     unsigned char refBytes[8];
     unsigned char currBytes[8];
     int currentPosition;
diff --git a/framefileio.cpp b/framefileio.cpp
index ce53d38..771d5fb 100644
--- a/framefileio.cpp
+++ b/framefileio.cpp
@@ -117,7 +117,7 @@ bool FrameFileIO::loadCRTDFile(QString filename, QVector<CANFrame>* frames)
     return true;
 }
 
-bool FrameFileIO::saveCRTDFile(QString filename, QVector<CANFrame>* frames)
+bool FrameFileIO::saveCRTDFile(QString filename, const QVector<CANFrame>* frames)
 {
     QFile *outFile = new QFile(filename);
 
@@ -197,7 +197,7 @@ bool FrameFileIO::loadNativeCSVFile(QString filename, QVector<CANFrame>* frames)
     return true;
 }
 
-bool FrameFileIO::saveNativeCSVFile(QString filename, QVector<CANFrame>* frames)
+bool FrameFileIO::saveNativeCSVFile(QString filename, const QVector<CANFrame>* frames)
 {
     QFile *outFile = new QFile(filename);
 
@@ -273,7 +273,7 @@ bool FrameFileIO::loadGenericCSVFile(QString filename, QVector<CANFrame>* frames
     return true;
 }
 
-bool FrameFileIO::saveGenericCSVFile(QString filename, QVector<CANFrame>* frames)
+bool FrameFileIO::saveGenericCSVFile(QString filename, const QVector<CANFrame>* frames)
 {
     return false;
 }
@@ -345,7 +345,7 @@ bool FrameFileIO::loadLogFile(QString filename, QVector<CANFrame>* frames)
     return true;
 }
 
-bool FrameFileIO::saveLogFile(QString filename, QVector<CANFrame>* frames)
+bool FrameFileIO::saveLogFile(QString filename, const QVector<CANFrame>* frames)
 {
     return false;
 }
@@ -403,7 +403,7 @@ bool FrameFileIO::loadMicrochipFile(QString filename, QVector<CANFrame>* frames)
     return true;
 }
 
-bool FrameFileIO::saveMicrochipFile(QString filename, QVector<CANFrame>* frames)
+bool FrameFileIO::saveMicrochipFile(QString filename, const QVector<CANFrame>* frames)
 {
     return false;
 }
diff --git a/framefileio.h b/framefileio.h
index ef2b918..0dac85e 100644
--- a/framefileio.h
+++ b/framefileio.h
@@ -26,11 +26,11 @@ public:
     static bool loadGenericCSVFile(QString, QVector<CANFrame>*);
     static bool loadLogFile(QString, QVector<CANFrame>*);
     static bool loadMicrochipFile(QString, QVector<CANFrame>*);
-    static bool saveCRTDFile(QString, QVector<CANFrame>*);
-    static bool saveNativeCSVFile(QString, QVector<CANFrame>*);
-    static bool saveGenericCSVFile(QString, QVector<CANFrame>*);
-    static bool saveLogFile(QString, QVector<CANFrame>*);
-    static bool saveMicrochipFile(QString, QVector<CANFrame>*);
+    static bool saveCRTDFile(QString, const QVector<CANFrame>*);
+    static bool saveNativeCSVFile(QString, const QVector<CANFrame>*);
+    static bool saveGenericCSVFile(QString, const QVector<CANFrame>*);
+    static bool saveLogFile(QString, const QVector<CANFrame>*);
+    static bool saveMicrochipFile(QString, const QVector<CANFrame>*);
     static QString loadFrameFile(QVector<CANFrame>*);
 };
 
diff --git a/frameinfowindow.cpp b/frameinfowindow.cpp
index e29111f..c7b74ef 100644
--- a/frameinfowindow.cpp
+++ b/frameinfowindow.cpp
@@ -3,7 +3,7 @@
 #include "mainwindow.h"
 #include <QtDebug>
 
-FrameInfoWindow::FrameInfoWindow(QVector<CANFrame> *frames, QWidget *parent) :
+FrameInfoWindow::FrameInfoWindow(const QVector<CANFrame> *frames, QWidget *parent) :
     QDialog(parent),
     ui(new Ui::FrameInfoWindow)
 {
diff --git a/frameinfowindow.h b/frameinfowindow.h
index e7fb050..1f96d19 100644
--- a/frameinfowindow.h
+++ b/frameinfowindow.h
@@ -14,7 +14,7 @@ class FrameInfoWindow : public QDialog
     Q_OBJECT
 
 public:
-    explicit FrameInfoWindow(QVector<CANFrame> *frames, QWidget *parent = 0);
+    explicit FrameInfoWindow(const QVector<CANFrame> *frames, QWidget *parent = 0);
     ~FrameInfoWindow();
     void showEvent(QShowEvent*);
 
@@ -27,7 +27,7 @@ private:
 
     QList<int> foundID;
     QList<CANFrame> frameCache;
-    QVector<CANFrame> *modelFrames;
+    const QVector<CANFrame> *modelFrames;
 
     void refreshIDList();
 };
diff --git a/frameplaybackwindow.cpp b/frameplaybackwindow.cpp
index f0c7ad4..e047815 100644
--- a/frameplaybackwindow.cpp
+++ b/frameplaybackwindow.cpp
@@ -16,7 +16,7 @@
  *
 */
 
-FramePlaybackWindow::FramePlaybackWindow(QVector<CANFrame> *frames, SerialWorker *worker, QWidget *parent) :
+FramePlaybackWindow::FramePlaybackWindow(const QVector<CANFrame> *frames, SerialWorker *worker, QWidget *parent) :
     QDialog(parent),
     ui(new Ui::FramePlaybackWindow)
 {
diff --git a/frameplaybackwindow.h b/frameplaybackwindow.h
index 7960faa..bc7feaa 100644
--- a/frameplaybackwindow.h
+++ b/frameplaybackwindow.h
@@ -27,7 +27,7 @@ class FramePlaybackWindow : public QDialog
     Q_OBJECT
 
 public:
-    explicit FramePlaybackWindow(QVector<CANFrame> *frames, SerialWorker *worker, QWidget *parent = 0);
+    explicit FramePlaybackWindow(const QVector<CANFrame> *frames, SerialWorker *worker, QWidget *parent = 0);
     ~FramePlaybackWindow();
 
 private slots:
@@ -57,7 +57,7 @@ private:
     Ui::FramePlaybackWindow *ui;
     QList<int> foundID;
     QList<CANFrame> frameCache;
-    QVector<CANFrame> *modelFrames;
+    const QVector<CANFrame> *modelFrames;
     int currentPosition;
     QTimer *playbackTimer;
     SerialWorker *serialWorker;
diff --git a/framesenderwindow.cpp b/framesenderwindow.cpp
index 77392cb..781ffe6 100644
--- a/framesenderwindow.cpp
+++ b/framesenderwindow.cpp
@@ -2,7 +2,7 @@
 #include "ui_framesenderwindow.h"
 #include "utility.h"
 
-FrameSenderWindow::FrameSenderWindow(QVector<CANFrame> *frames, QWidget *parent) :
+FrameSenderWindow::FrameSenderWindow(const QVector<CANFrame> *frames, QWidget *parent) :
     QDialog(parent),
     ui(new Ui::FrameSenderWindow)
 {
diff --git a/framesenderwindow.h b/framesenderwindow.h
index 2360240..ea0db57 100644
--- a/framesenderwindow.h
+++ b/framesenderwindow.h
@@ -15,7 +15,7 @@ class FrameSenderWindow : public QDialog
     Q_OBJECT
 
 public:
-    explicit FrameSenderWindow(QVector<CANFrame> *frames, QWidget *parent = 0);
+    explicit FrameSenderWindow(const QVector<CANFrame> *frames, QWidget *parent = 0);
     ~FrameSenderWindow();
 
 private slots:
@@ -26,7 +26,7 @@ private:
     Ui::FrameSenderWindow *ui;
     QList<FrameSendData> sendingData;
     QList<CANFrame> frameCache;
-    QVector<CANFrame> *modelFrames;
+    const QVector<CANFrame> *modelFrames;
     QTimer *intervalTimer;
 
     void doModifiers(int);
diff --git a/graphingwindow.cpp b/graphingwindow.cpp
index d955cde..2ce0c9c 100644
--- a/graphingwindow.cpp
+++ b/graphingwindow.cpp
@@ -4,7 +4,7 @@
 #include "mainwindow.h"
 #include <QDebug>
 
-GraphingWindow::GraphingWindow(QVector<CANFrame> *frames, QWidget *parent) :
+GraphingWindow::GraphingWindow(const QVector<CANFrame> *frames, QWidget *parent) :
     QDialog(parent),
     ui(new Ui::GraphingWindow)
 {
@@ -344,8 +344,8 @@ void GraphingWindow::addNewGraph()
 void GraphingWindow::createGraph(GraphParams &params, bool createGraphParam)
 {
     int tempVal;
-    float yminval=10000000, ymaxval = -1000000;
-    float xminval=100000000000, xmaxval = -100000000000;
+    float yminval=10000000.0, ymaxval = -1000000.0;
+    float xminval=10000000000.0, xmaxval = -10000000000.0;
 
     qDebug() << "New Graph ID: " << params.ID;
     qDebug() << "Start byte: " << params.startByte;
diff --git a/graphingwindow.h b/graphingwindow.h
index 5ed42fd..a1502f4 100644
--- a/graphingwindow.h
+++ b/graphingwindow.h
@@ -29,7 +29,7 @@ class GraphingWindow : public QDialog
     Q_OBJECT
 
 public:
-    explicit GraphingWindow(QVector<CANFrame> *, QWidget *parent = 0);
+    explicit GraphingWindow(const QVector<CANFrame> *, QWidget *parent = 0);
     ~GraphingWindow();
     void showEvent(QShowEvent*);
 
@@ -53,7 +53,7 @@ private slots:
 private:
     Ui::GraphingWindow *ui;
     QList<CANFrame> frameCache;
-    QVector<CANFrame> *modelFrames;
+    const QVector<CANFrame> *modelFrames;
     QList<GraphParams> graphParams;
     QPen selectedPen;
     bool needScaleSetup; //do we need to set x,y graphing extents?s
diff --git a/mainwindow.cpp b/mainwindow.cpp
index 2028a45..819e0d1 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -307,18 +307,21 @@ void MainWindow::handleLoadFile()
         ui->canFramesView->scrollToTop();
         model->clearFrames();
 
-        if (dialog.selectedNameFilter() == filters[0]) result = FrameFileIO::loadCRTDFile(filename, model->getListReference());
-        if (dialog.selectedNameFilter() == filters[1]) result = FrameFileIO::loadNativeCSVFile(filename, model->getListReference());
-        if (dialog.selectedNameFilter() == filters[2]) result = FrameFileIO::loadGenericCSVFile(filename, model->getListReference());
-        if (dialog.selectedNameFilter() == filters[3]) result = FrameFileIO::loadLogFile(filename, model->getListReference());
-        if (dialog.selectedNameFilter() == filters[4]) result = FrameFileIO::loadMicrochipFile(filename, model->getListReference());
+        QVector<CANFrame> tempFrames;
+
+        if (dialog.selectedNameFilter() == filters[0]) result = FrameFileIO::loadCRTDFile(filename, &tempFrames);
+        if (dialog.selectedNameFilter() == filters[1]) result = FrameFileIO::loadNativeCSVFile(filename, &tempFrames);
+        if (dialog.selectedNameFilter() == filters[2]) result = FrameFileIO::loadGenericCSVFile(filename, &tempFrames);
+        if (dialog.selectedNameFilter() == filters[3]) result = FrameFileIO::loadLogFile(filename, &tempFrames);
+        if (dialog.selectedNameFilter() == filters[4]) result = FrameFileIO::loadMicrochipFile(filename, &tempFrames);
         if (result)
         {
+            model->insertFrames(tempFrames);
+
             QStringList fileList = filename.split('/');
             loadedFileName = fileList[fileList.length() - 1];
 
             model->recalcOverwrite();
-            model->sendRefresh();
             ui->lbNumFrames->setText(QString::number(model->rowCount()));
             if (ui->cbAutoScroll->isChecked()) ui->canFramesView->scrollToBottom();
 
@@ -348,7 +351,7 @@ void MainWindow::handleSaveFile()
 
     if (dialog.exec() == QDialog::Accepted)
     {
-        QVector<CANFrame> *frames = model->getListReference();
+        const QVector<CANFrame> *frames = model->getListReference();
         filename = dialog.selectedFiles()[0];
         if (dialog.selectedNameFilter() == filters[0]) result = FrameFileIO::saveCRTDFile(filename, frames);
         if (dialog.selectedNameFilter() == filters[1]) result = FrameFileIO::saveNativeCSVFile(filename, frames);
@@ -433,7 +436,7 @@ void MainWindow::handleSaveDecoded()
 void MainWindow::saveDecodedTextFile(QString filename)
 {
     QFile *outFile = new QFile(filename);
-    QVector<CANFrame> *frames = model->getListReference();
+    const QVector<CANFrame> *frames = model->getListReference();
 
     if (!outFile->open(QIODevice::WriteOnly | QIODevice::Text))
         return;