Emory,

Have you tried a different ESC? It didn't sink in that you are running a Phoenix 85 with an outrunner. There are a lot of people having trouble with Castle ESCs and outrunner motors. I know CC is working hard on this and maybe they have the problem(s) solved, but it might be worth it to give a Jetti or Hacker ESC a try..... Maybe even borrow one just for test.

Say, did you build these Black Magic airframes yourself? The reason I ask is that I'm very interested in giving one a try, but I've never built any precision airframes before and I'm a little intimidated by it.