I have put them next to each other using the dubro switch mounts thru the fuse side right next to each other, HOWEVER, I have had a problem once.. I had the ignition and receiver switches next to each other and after 600 or so flights, when I started the plane up and was doing a run up the receiver quit working and the motor started missing.. Upon investigation the ignition had had a a broken wire internally and there was a spark intermittanly jumping from the ignition switch to the receiver switch.. With high voltage strange things can happen... I can tell you that there is NO WAY IN HECK I would run the power and ignition switches to a common aluminum(ie conductive) mount..