da rock, yeah, thickness is a % of chord, I probably over simplified my question.

Terry, if the issue is mainly landing, maybe you can reflex both ailerons just for landing? I.E., put in a airbrake mix on a switch and raise both ailerons a few degrees for landing. This will increase your sink rate, but will reduce abrupt stall tendency as it puts negative camber into the wing. You could also add a bit of up elevator offset with the mix to negate the sink.