yes, you are right i have a cap. However, the only thing i did was replace the spinner-nut with a spinner. also, it seems to be a bit tail-heavy because it takes some fancy maneuvering to get out of a knife edge spin. however, what is really interresting is that it never did that before, and i have not changed anything besides that spinner. also, it used to require a little down elevator to keep it strait in a knife edge, not it odes the nose tuck so harshly that it takes almost 1/3 of my elevator to compensate. that is a lot for a plane that is so responsive and has such big control surfaces. There see4ms to be no reason for the change