The TT Pro 36 have almost identicle specs as the GP 42 that I had in the plane. And I was definitely wanting more power. I do prefer to fly on the wing as well, but in the case of aerobatic models like the Extra 300 I prefer to have an adequite reserve of power to perform your manuvers with authority. With the GP 42 I found myself flying almost the whole time at full throtle. Any less than full and the plane felt like a trainer (slow and boring)! So you can see why a .36 won't cut it for this plane coupled with my flying preferences.