Thanks for all the replys guys. Im definately not going to buy a 4 stroke. Alot has changed in the last couple days. The lil edge 540 that I ordered from aeroworks was on back order for 8 weeks, so I canceled that and ordered the .60-.90 Aeroworks Extra 260. So a .75AX is out the question now, to power this plane im going to use the .91FX. Well yesterday I went visit a buddy at his flying field, he was flying a Great Planes Extra300s with a Brisson 40cc engine, man that thing was bad to the bone. And now I want the exact same set up. So, with all that being said, im going to try and get rid of the lil Extra when it comes in. I have it for sale on this sight, im gonna sell it for the same price I paid, but i'll ship for free. Basicly saving the buyer $24.95. Once the UPS guy drops it off, i'll just turn around and ship directly to the buyer. I wont even open the box. Guys spread the word for me. But if it doesnt sell, im gonna go ahead and build it. My future wife wants to buy me a plane for christmas, well I know what she can buy lol.