Britton, Out of the ones that you have listed I would go with the Saito 82. It's actually lighter than the 72 and has more poop. Or is that pep? [:-] Anyway chief aircraft will send you a "monthly specials list" if you send them your email address and you should be able to get one for about $235. [link]http://www.chiefaircraft.com/[/link] I would think that you'd be happier with a 4 stroke on the UCD.

Sctcrash, I checked out a bubbleless filter from Tower and that sounds like it would do the trick. Thanks for the idea. [8D] I didn't think of that. I did put some foam behind the tank so I'll see tomorrow if that helped. With your UCD I would just get it running and fly around through some tanks of fuel before trying hovering or anything else. If it's anything like my Saito 82 was at first they aren't real reliable untill they've been around a bit.

Hey Gary, I got to thinking that I could put an extra set of landing gear on the top of my plane and fly inverted. [8D] It would probably help with inverted flat spin landings too. [X(]