If you go into the gas engine forum you can read up on most everything you want to know. With the advent of 2.4 RF can still happen but not like the days of 72. Something has to be very wrong to pick it up today. There were a couple of different thoughts about where to install the throttle servo. One thought was to install the servo close to the engine to keep it away from the RX. The other thinking was that the servo would pick up the noise and just send it along the servo wire to the RX. The other thinking was to mount the servo as far away from the ignition as you could get it. I have tried it both ways and gotten away with it. The one thing most people would tell you never to do is use a metal rod from your servo to the throttle. I always used Nyrod with ball swivels or plastic clevises.