I am also in the AFF course and am only on my 12th jump. I know where your coming from, it seemed like I passed cat A thru C without any problem, but now I am stuck on Cat D. My turns, for some reason are a real problem and I find myself getting unstable. Jumps 11 and 12 finally went a little better. In my case it is just a matter of relaxing and watching my leg position. I also tend to make my movements too fast. I really like to jump though, so I will keep going up as long as it takes. Falling through the sky for Keri.