Thanks for the feed back. From your post I believe I would loss to much by putting a heavy 31cc gasser in this kit. I have a good running Magnum XL 75 and a Super Tigre 91. I will use one of these engines in it. I read on the Dynaflite web page that see flies more scale like with the engine the smaller rated engines. I do plan to put a 91 4 stroke in her when I can afford to buy one. But for now the 75 or 91 2 stroke will do.

Thanks