I agree that attempting flaperons on a Pitts is almost certainly result in a Monokote bag of busted up wood. I am going out on a limb and guess that the reason for wanting to do this is that the airplane is landing faster then what you feel it should. My question is where is the CG and have any flight tests been done to evaluate the CG position? My first impression is that if the airplane is landing fast is that the CG is on the forward side and a major contributor to the landing characteristics.