My main fear is flutter on the flaperon. I disconnected my flaperons to see how much weight i'd need to add to the counter-weights and determined that they are not balanced to start with. If they were, i'd have these trim tabs installed by now. Anyone have any thoughts on avoiding flutter with these things? If i do as Levil Aviation says and make it so the flaperons balance with the AP trim tabs on, should I be OK or might they need to be a little aft CG like they are now? If they need to be aft CG, then I could try to keep the CG where it is now. Of course i'm talking about the CG of the flaperon while disconnected, not the whole plane.