I have a Goldberg Sukhoi that does this to the left if I really honk on it. I would check #1 the thrust line - if it is aimed up or down when you pull the throttle back the nose will react to the required elevator trim for level flight in an appropriate manner, down thrust will give you a nose up when the power is off. It sounds like the wing drop is probably a difference in the incidence of the wings, at the roots or at the tips. I think my airplane does it because there is a slight amount of difference in where the ailerons sit in neutral, which causes a tip stall under the proper conditions. According to one of the TOC pilots you can test the cg by pulling up 45 degrees and let go of the sticks, the nose should drop slowly after several seconds ( do this right side up and inverted) , if the nose rises you are tail heavy. You can also tell tail heavy by extreme sensitivity on the elevators. If it does the wing drop excessively you can experiment with stall strips near the wing root on the bad side to get the wing root to stall first. These are normally small triangle strips glued to the leading edge in the proper position, the position being determined by flight test .
charliek
if it don't fly I don't mess with it