I have to agree with Stick, anything beyond 100 feet with the antenna down, you're gonna start getting some movement. From all of the replies I've had since I started this post, I've gotten a world of info from people, things that you may need to check. There are several things that could be causing you problems, with a PPM receiver anyway. I guess as long as you don't have any problems with the plane supplied with a PCM receiver, leave it alone and fly the thing.