RE: Flaperons
I will second the warning on working up to high values of flaperon mix esp. if the CG is forward.
The flap effect can cause you to run out of elevator authority, just try a real slow speed nose up pass at altitude and see what happens. If the nose over is pronounced then either flick the switch [preferred] or power up.
However with the model you have I suspect 75 degrees elevator with 50 degrees flap is a good guess for 3D flying. Dual rates and lots of expo advised though!