RE: Profile ARF for 20cc engine ?
Save yourself the trouble on the OMP's... unless you like putting fuselage half's back together. Pretty well known for breaking in half right behind the wing pretty easily. I fixed mine 3 times over the last 2 seasons, so now it's being retired. Building a Mojo 65.
Regarding an ARF, the one that's sold under half a dozen different names is kinda shy of wing area. To my knowledge, if you're looking for real profile performance, I think you'll have to build it? There's just not a lot to them, so the build goes pretty quickly if that's any help.