here is a quote by PitCrew in the spektrum thread:
I used a Novak 4700 mp capacitor and wired it to a servo plug and pluged it into the Batt/Aux slot on the receiver...The Cap solves all the problems. If fact, if I just unplug it, the car goes nuts, then plug it in, everything is smooooth....Dont forget that the receiver itselft draws TWICE as much current as a standard receiver.
hope this helps