Ok, got four short flights today on the biplane. And all you guys that said there would be strange couplings..................we're right (kinda)! Actually the only noticeable occurence is rolling and diving in the direction of rudder application. The first flight scared me to death on rudder, then I mixed in the wrong aileron direction and things got worse the second and third flight! Finally with Steve Maxwell's calm advice, I got the right mix direction in. It's better, but still not good (with 15% aileron mix). Also had some elevator vibration where you could see the whole stab oscilating. I"m going to stiffen up the rear end of the plane before I fly it again. SHould I change the dihedral of the wing to fix this or just mix it out? If I do change dihederal, which way and on what wing?