I balance my low wing planes inverted. To include the GWS Corsair I have. I measure back from the leading edge of the wing and make a small mark then flip the plane upside down and place my fingertips on that spot and then balance it. I do know that with my Corsair the recommended CG made the plane tail heavy. Not good. Had to add a ton of nose weight to get it where it would not tip stall on me. I think personally the GWS planes in general are a little more user freindly with a tick extra nose weight. My buddy has a zero and I think he used about a 1/4 oz nose weight to get his stable.

I would guess around 15-20 minutes flight time with that setup. You should be able to do loops and rolls with it. My biggest problem was breaking props and bending shafts until I got the hardened shafts and the adapter from e-flightline and started using the APC props.

Good luck.[8D]