I'm finishing my Reaper as well. I chose to cover it with Utracote because I heard that it worked better with obechi. This is the first time that I have used it and I think that it's great. As far as the obechi, I wish that the wings were sheeted with balsa. The skins have cracks running parallel to the leading edge. The skins were sanded as mush as I felt was prudent without compromising the strength and the cracks show through the covering...maybe resin and glass would be better.

As far as the fins go, let's just say that the British either hit it (Spitfrire) or they don't (Fairey Swordfish). I redesigned the fins to make them more palatable IMHO. They seem to be stronger as well (see below).

I read comments that the aircraft would "run out of elevator" on landing, so I enlarged the elevators. This lead my to think that the stabs could be a little weak, so I added .007" by .500" carbon strips top and bottom to the stabs.