Does the problem go away when you disconnect the camera transmitter? Can you borrow another battery to power the camera transmitter seperately as a test? I had video interference problems with my rig from a common battery and resolved it by seperating them. We fly on 72Mhz systems and 2.4Gig Spektrums with a 2.4gig video transmitter. I routinely see the spastic servo flutter you speak of when the reciever loses signal from the transmitter. I cannot imagine it would be different for 35Mhz.

Bill