Third post;
The fuse, and tail feathers would be fairly simple. The wing would be over my head. Plug in wings would be a nice touch also. There are several ways to make a "kit". One would be to just have the foam parts cut and sheet as you said. That's the direction I was going to go. Next would be a full blown kit with all balsa and hardware, and anything in-between. First would be to get a proto done and flying though.
Looks like a little bigger rudder and a stronger landing gear is the recomended revisions. No big deal. As I said mine was built with a ST 3000, I have another ST 3000 on gas I would like to try. Maybe even experiment with another gas powerplant. Lon