I echo rcplanefan's comment regarding spins. I received a zero during a contest last summer because the judge felt the airplane "rolled" into the spin instead of "breaking" into the spin due to a stall. Of course, I didn't see it that way! [sm=disappointed.gif] It's easy to get a zero on this figure if your flying in front of experienced judges ... be sure to read the guide and seek advice from a seasoned competitor.
Spins - read the judging guide here! Basically, the plane should stall to start the spin, and you should finish it with a vertical downline.