my buddy doug has one of these with a pumped os91 4 stroke in it. this plane flies GREAT!!.
this plane is fast, agile, and flies very nicely inverted. it slows down to a crawl for landing. so far the covering has held up very well.

i liked it so much i bought one myself- but i haven't put it together yet.

i would reinforce the horizontal stab- his broke in flight but he saved the plane and rebuilt the stab. also on all arfs i normally go over the inside of the front of the plane with a glue bead on every joint i can reach.

this plane is built very much like the hangar 9 mustang that i have. i think it either is built in the same factory or somone copied the other persons basic design/structure.

ed