My friend had a Saito 72 on his and loved it dearly. It weiged a good 6 or 7 pounds but was a great aerobatic plane.

He could do the prettiest inverted flat spins with it. It could knife edge, hover, anything you wanted it could do with a little practice. I had a chance to fly it a few times and noticed the rudder has great athority and the elevator had to be tuned down because it was very very affective.

His wing on top almost came off once because the bolts sheared completely off, so he replaced them and hasnt had a problem since. Good luck with yours