thats a good point, if the gp cub isnt going to work, i think some ppl have done the sig clipped wing cub. i have thought about buying a couple ready-made engines, but i want the satisfaction of saying "i did it myself........with the help of the guys on RCU" also, is there any way of using the stock magneto ignition so it will start easier? the guy at my club has the electronic, and on some days he has quite the time starting it. i also will probably do some winter flying, so the more reliable the better.