Hmmm. We haven't seen problems with the Voltwatch, but that doesn't mean that some might. We do know that NO Futaba servo that's working properly should cause any kind of glitching or erratic operation with ANY Futaba receiver. Any combination of Futaba servos on the same recevier should work without problems. Got glitching? Then something's not working right somewhere.

The Hobbico Voltwatch should not cause problems, either. It does do voltage sensing, but shouldn't interact with the rest of the system. It absorbs so little current that it should be nearly invisible to the servos and receiver. There's nothing in the unit to cause any kind of oscillation. The only failure modes we can think of would either make it inoperative (open), or cause faster battery drain (short or partial short). There's nothing to oscillate.

We'd need to see the unit that causes glitching when attached to a receiver and 'clean' when it's not.