I'm afraid that's beyond my experience, so I'm not sure what to advise. All I can say is I fly mostly aerobatic routines, IMAC & pattern, and I address any unintended snapping tendency as soon as it arises, which is seldom now that I've learned how to avoid it. I avoid it by keeping my elevator throws to the minimum necessary to do my aerobatics, usually something around 10˚ deflections; by taking steps to lighten any kit-built or ARF model; and by moving CG forward if necessary. I also do static lateral balance to eliminate any rolling tendency at low speed.

I do fly 3D for fun, and there of course snapping is part of the game. I have never done a delta or flying wing or any other variation of ailevators, so my understanding of this approach is shallow at best.