Bob, as I modified the ailerons and flexed them before/after and I finally came to the realization that the right aileron was whimpier than the left one to begin with. I felt/squeezed around some (on the aileron) and finally saw the difference. The top and bottom LE sheeting up to the cap strips on the weak aileron was 1/16" soft stock. The rigid aileron had 3/32" hard stock. As a matter of fact the soft stock was cracked near the hard-point section. So ailerons are done, the good aileron feels like it did to start with. I cut away the lightning hole in the ply servo mount to add a stiffener like you and as I'm sealing down the edges before cut-away I notice that the rear area near the trailing edge is not only loose as we've all noticed but it's missing glue at the rear butt joint to the trailing edge sheet which is the same 1/16" X 3/8" stock found on the aileron. All that thin ply is merely butt glued to the light balsa edge sheet stock. Better add some overlapping stock there too. 2 Oz of high torque servo at hi-G's and a 1/16" butt joint? Guess the ribs are the only support. Now I can say we have 2 different stock aileron rib configurations and 2 different sheeting configurations on top that.