diff --git a/ChangeLog b/ChangeLog
index 888b457f..95b712a6 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -21938,3 +21938,5 @@
 	* Added 'RDMainWindow' to rdlogedit(1).
 2021-06-21 Fred Gleason <fredg@paravelsystems.com>
 	* Added 'RDMainWindow' to rdadmin(1).
+2021-06-21 Fred Gleason <fredg@paravelsystems.com>
+	* Added 'RDMainWindow' to rdcartslots(1).
diff --git a/rdcartslots/rdcartslots.cpp b/rdcartslots/rdcartslots.cpp
index 16903c81..e5e6d53b 100644
--- a/rdcartslots/rdcartslots.cpp
+++ b/rdcartslots/rdcartslots.cpp
@@ -27,7 +27,7 @@
 #include "rdcartslots.h"
 
 MainWidget::MainWidget(RDConfig *c,QWidget *parent)
-  : RDWidget(c,parent)
+  : RDMainWindow("rdcartslots",c)
 {
   QString err_msg;
 
@@ -120,11 +120,11 @@ MainWidget::MainWidget(RDConfig *c,QWidget *parent)
   // Fix the Window Size
   //
 #ifndef RESIZABLE
-  setMinimumWidth(sizeHint().width());
-  setMaximumWidth(sizeHint().width());
-  setMinimumHeight(sizeHint().height());
-  setMaximumHeight(sizeHint().height());
+  setMinimumSize(sizeHint());
+  setMaximumSize(sizeHint());
 #endif  // RESIZABLE
+
+  loadSettings(true);
 }
 
 
@@ -193,6 +193,7 @@ void MainWidget::closeEvent(QCloseEvent *e)
   for(unsigned i=0;i<panel_slots.size();i++) {
     delete panel_slots[i];  // So temporary carts get cleaned up properly
   }
+  saveSettings();
   exit(0);
 }
 
@@ -235,7 +236,6 @@ int main(int argc,char *argv[])
   RDConfig *config=new RDConfig();
   config->load();
   MainWidget *w=new MainWidget(config);
-  w->setGeometry(QRect(QPoint(0,0),w->sizeHint()));
   w->show();
   return a.exec();
 }
diff --git a/rdcartslots/rdcartslots.h b/rdcartslots/rdcartslots.h
index 460092e3..333b9594 100644
--- a/rdcartslots/rdcartslots.h
+++ b/rdcartslots/rdcartslots.h
@@ -22,6 +22,7 @@
 #define RDCARTSLOTS_H
 
 #include <rdcartslot.h>
+#include <rdmainwindow.h>
 #include <rdwidget.h>
 
 //
@@ -31,7 +32,7 @@
 #define METER_INTERVAL 50
 #define RDCARTSLOTS_USAGE "\n"
 
-class MainWidget : public RDWidget
+class MainWidget : public RDMainWindow
 {
   Q_OBJECT
  public: