i tried the AA without a top wing and the motors on the bottom wings. with no dihedral, the turns were tricky sometimes, but you could pull barrel rolls sometimes if the motors were close enough to the ends of the wings. i had pleanty of empty AA frames, so i just cut the top off of one. it was quicker than the AA, not quite as nimble, but fun for a while (winds kill it!).

thanks for the link, neurotex

nick