He had also read somewhere that some guys were flying these with both ailerons raised ( to what extent he couldn't recall).
Raised Ailerons are required for the early Sky master and Fei Bao T-45 / Hawks to try to minimize the chance of tip stall during low speeds i.e landings, this should not have the effect that you are describing.
I would stay away from a mix as you described, I would look for the source of the problem.
