Little improvement, it remains some like this one ;)

companion/src/modeledit/expodialog.cpp

@@ -178,7 +178,8 @@ void ExpoDialog::valuesChanged()
           phtemp >>=1;
         }
       }
-    } else {
+    }
+    else {
       ed->phases=0;
     }  
 }

companion/src/wizarddialog.cpp

@@ -317,17 +317,26 @@ ThrottlePage::ThrottlePage(WizardDialog *dlg, QString image, QString title, QStr
   l->addWidget(noMotorRB);
   l->addWidget(new QLabel(tr("<br>Throttle Channel:")));
   l->addWidget(throttleCB);
+
+  connect(motorRB, SIGNAL(toggled(bool)), this, SLOT(onMotorStateChanged(bool)));
 }
 
-void ThrottlePage::initializePage(){
+void ThrottlePage::initializePage()
+{
   populateCB(throttleCB);
 }
 
-bool ThrottlePage::validatePage() {
+bool ThrottlePage::validatePage()
+{
   releaseChannels();
   return bookChannel(throttleCB->currentText(), THROTTLE, 100 );
 }
 
+void ThrottlePage::onMotorStateChanged(bool toggled)
+{
+  throttleCB->setEnabled(toggled);
+}
+
 AileronsPage::AileronsPage(WizardDialog *dlg, QString image, QString title, QString text, int nextPage)
   : StandardPage(Page_Ailerons, dlg, image, title, text, nextPage)
 {

companion/src/wizarddialog.h

@@ -105,14 +105,19 @@ private:
 class ThrottlePage: public StandardPage
 {
   Q_OBJECT
-public:
-  ThrottlePage(WizardDialog *dlg, QString image, QString title, QString text, int nextPage=-1);  
-  void initializePage();
-  bool validatePage();
-private:
-  QRadioButton *motorRB;
-  QRadioButton *noMotorRB;
-  QComboBox *throttleCB;
+
+  public:
+    ThrottlePage(WizardDialog *dlg, QString image, QString title, QString text, int nextPage=-1);
+    void initializePage();
+    bool validatePage();
+
+  protected slots:
+    void onMotorStateChanged(bool toggled);
+
+  private:
+    QRadioButton *motorRB;
+    QRadioButton *noMotorRB;
+    QComboBox *throttleCB;
 };
 
 class AileronsPage: public StandardPage