Dont have any experience with Fuji's, but I did have a similar problem with a 1/4 scale AC I was flying. The solution was to twist the wiring that ran out to the aileron servos through the wings (this was the longest lead run),as well as then wrapping them with aluminum foil as a shielding. Then, run a wire from the engine block as a ground and attach it to the outer foil shielding. This should block a considerable amount of the interference that is coming in to those long lead runs, and was causing them to act basically as antenna's, picking up whatever interference they could. If you have other long leads running out to servos in the Fuse or Wing, I suggest the same thing. I don't fly PCM, and this worked fine. Hope it helps.

ZZ.

PS. Resistor plug is a must too!