Can't seem to get levers to go all the way to full on or full off in there slots on the control panel.Have installed all new cables and everything works freely when disconected.Is there some kind of adjustment other then 1/2" you get on cable mounting tab? Also when control box is fastened into dash it is pulled out of square to dash opening.Is there some kind of shim that goes between the controlls and the dash to keep it centered in the opening.The manuel shows nothing.