RE: 9C Snap Roll Switch
If you are giving too much input on rudder or elevator, the model will over-snap. that is to say when you let go it will keep rotating. (there are aother factors, too, but the key factors are too much rudder or elevator). if you use too little, the model will simply roll and not give you that "ugh" sensation as it truly SNAPS.
So, what was the problem that you corrected, if you dont mind? always like to learn where mistakes can be made to help others later!