balsa brain...I think you misunderstood rseravalle's post back on page three. He said he was thinking about using a 60cc engine but you seemed to think he was talking about a point 60 engine, as in a .60. I think he was talking about something like a G62...
Anyway reseravalle, if you're still around...I think the 60cc is a little big myself....but it can be done. There's a guy who's a regular in the forums who has been flying his for years with a Quadra 75. He shortened the nose and probably mounted everything in the rear fuse.