Krayzc, I flew the u-can -do all day on Saturday and it flew great, but today Sunday everything changed the glitching problem has returned it only happens when I'm at idle coming in for a landing at the very worst time, i cant explain it everything was great for over a month then all of a sudden it starts glitching just like before when my ignition battery was too close to the receiver i fixed the problem then by moving by ignition battery up inside the canopy area near the back. Can you think of anything that can happen on these engines that would make a glitch appear out of no where? i even changed to a different radio to see if that was the problem but it didn't help. where is you ignition battery and receiver located on this plane?