Well here is the latest upgrade to the plane. I replaced the basic turn coordinator I had in the panel with a new ADI from TruTrak. It is a solid state (no moving gyro) AH. It shows pitch, roll, and gps direction and comes with a backlight. So far I have about 10 hours of flying on it and it works great. Keeping the right side up is easy using it. I played around a bit with it trying to tumble it. If you roll up to 90deg and then return upright it recovers quickly. If you roll all the way around 360deg it is tumbled for about 20 seconds, during which time it indicates low and slightly turning. After about 20 seconds it rights itself properly and continues to work fine with no external input.