ORIGINAL: DAN REISS
Garry, It looks like your receiver antenna is running right next to and parallel to your battery wires to the receiver for a few inches. That is a very bad layout. That will lead to a lot of coupling you don't want. Get them separated by as much as possible. Dan.
That was the first thing I thought of and that is something I can do quickly. Replacing the throttle set up wont be easy.