I've built 2 scratch built R/C models from AMA plans, one old kit from the 80's of a biplane and am now building a Guillows kit with my grandson. I think I am ready to build a fine 1/4 scale WWI era biplane powered by a large 4 stroke. No gas! Any recommendations on who makes a great kit? I've been looking at Balsa USA and they look pretty good. Any experience with them? Thanks! Doc