RE: Custom Piston Rings
Careful with that one Captain. Mine is like yours but is the blue "Alien" version. I set it up with the recommended c.g. and control throws, and it was "snap happy". It would readily snap out of loops, and if you got it too slow. I reduced the elevator throw, and have yet to test fly it again. (Too busy.) I may have to move the c.g. forward as well, though I would hate to as it flies inverted really nicely. However, it is even more "snap happy" inverted than upright.
AV8TOR