I had one and it was a blast to fly. I had built it as a tail dragger with dual aileron servos and all control surfaces enlarged, no dihedral, and spruce wingspars. I flew this plane hard and it held up to everthing I threw at it except a high speed dive. Wing flutter caused the crash. The pilot (me) caused the wing flutter. I would build another without a doubt. I think it is a better plane than the 4*40 for sure.