All good answers, Scott, but my real point in the question was to point out
that just moving one aileron down will not make any change in the ships
tendency to turn left. Only a trim tab on the aileron (bent up) to make that
ailerom fly down will accomplish the desired correction. As you pointed out, a
trim tab on the rudder (bent left) would also do the same thing.

Trim tabs = drag and we seldom see them on sailplanes. The real problem is
usually a bad repair in the wing or bad rigging. Believe it or not, a major
sailplane manufacturer has eccentric lift fittings that will correct for wing
misalignment that came from the factory with twisted wings. You just tell them
*how bad your ship turns left* and they determine how much *off center* your
new drag fittinge should be.
JJ Sinclair