hi samtech

Please keep it in mind that these type of models are designed to snap to a certain extent.
Taming them too much could kill the performance.
Every Cap, Extra, Sukhoi etc, that I have ever flown, snapped if large elev was introduced.
When the model is no longer going in the direction that it is pointing, (because it is changing direction too quickly) the airflow over the wing will break up and it will snap.
To me this is a good thing not a problem.