Tomd, okay...I think I understand what happened. I'll go ahead and balance mine at 70mm so that it is level. That should put me in the ballpark as far as CG is concerned. Do you have any experience with electronic flight stabilizers (gyros)? I bought a couple from Nitro Planes. They were only $19. I thought I would try them out. I've been flying for many years and most of my planes are nitro fueled. But I'm not sure if these little stabilizers will work with nitro engines since they tend to vibrate more than electric motors. I guess I could try one out on one of my older planes first. Just wondering if you had any experience with them...