Here's a question for you...

I've been flying one of Mike Fredrick's Bat Tricks. The plane is super, but one flying characteristic perplexes me (not a tremendously hard task). On inside loops that are not excessively tight, the plane snaps and then resumes flying. The snaps are always the same; the wings end up level, and the plane continutes flying at or above the same altitude. What I find strange, however, is that I can push a very tight outside loop without the plane snapping. I have about 9/16" elevator throws in both directions. Anyone have any suggestions, or is this just the nature of this critter?

Thanks!