I really don't plan on aerobatics with it, I have other fun planes for that. This is just for lazy cruising around the sky and relaxing. I had an O.S. 91 4-stroke on it before and it was slightly tail heavy. It flew ok but wasn't nothing exiting. I am a hobby machinist and thus how this conversion came about. I seem to collect these small 2-cycle engines at an alarming rate and they are allways like new inside. I just found a new Ryobi 31 cc trimmer with a broken string head. The engine is in perfect shape. Lets see, need more planes......