I'm using Spektrum DSM2, and also, four servos, plus the steering servo, all from a bec onboard the ESC. The spec on the 85 amp controller, is 5 volts, 5 amps.

The plane this interference keeps affecting is going to fly again...and soon. It's a HET F-20. I'm moving the RX away from the fan uinit.

The Saab was nailed too. Flew it that day at the field. the CG range is 67 cm from the tail. The Saab after my mods was 66 cm. After field repairs, the cg was forced back to 67 cm by moving the battery. This is a big, long aircraft, and the CG was in range...at least, controllable. The peculiar thing is that there is only one sort of 'splash'. "UP" both planes.

Tail heavy? MaYBE But the condition on both planes for CG range, was that they CG's were both in range, and trimmable by elevator. The planes were built and balanced to kit specifications.

What I'm seeing is that a NON-Pitch-sensitive planform life the Saab, suddenly, VERY pitch sensitive, in only "UP"
What I saw with the TERRIBLY pitch-sensitive F-20, was that it is VERY particular about balance, and elevator throw range, or in other words...a very "PECULIAR" sensitivity.