A while back I did flaperons on a 40 size plane. Interesting project. Fun to play with but came to the realization that it was wasted effort on a plane this light that already had good landing and take off characteristics. Still I enjoyed it as it did work very well. As far as splitting ailerons for individual flaps when removeing 30% of the ailerons length it seems that adding that same lost 30% to the chord length would make sense as well as increasing the chord length on the flap to match. Joe