Sorry about that last post, I was clicking on the Non-RC .20 to .40 catorgory... So I found an O.S. that I like. I didint want to get to expensive so I found this one and it looks like a strong runner. heres the link http://www2.towerhobbies.com/cgi-bin...?&I=LXBY16&P=0 I dont know anything about these so does anyone know if thats a decent running engine? I'm not looking for power, i just want something that will hold a tune preaty well and will keep running good for awhile.