I have used it on the ailerons of an 86" don smith ki 61 Tony (20 lb) and know of at least one other that applied the same method on that design. It works fine and is slop free. I find that it helps if you make the control surface removable- i.e. use robart hinge pockets or some sort of detachable hinge.

It works, no flutter or slop in the linkage and no exposed horn.

Jeff