I'm not sure about the 3d stuff, but I have elevator and flap mixing for the models that have flaps. Haven't tried flaperons in the sim, but have tried them on my real model. I did not like them. Real full flaps work much better than flaperons IMHO. All mixing was done in my radio, an old Futaba Super 7. I use XTR mostly to improve my basic flying skills, but have done some 3d stuff too. I think Reflex XTR is just fantastic.[8D]