Well thanks for the good tips guys. I cut down on my elevator in the loop and it is no longer snapping out. It's now making giant graceful loops like a biplane should.

While, I have you guys here, one more question....What would you say would be the best prop for this combo. I am running a 16x6 scimitar, and it's turning almost 9000 rpm. That seems a little much on the high end. Could I do a 17x6 or 18x6 maybe?

any and all advise is welcome