Looks like there is a remaining disagreement in this thread, so I think I should stir it up a bit
Fast versus slow rudder servo/winch?
Fast would be needed to prevent "spin out" (broaching?) in heavy air downwind (see Rick's post)
Slow would force you to sail smoothly and avoid the rudder as a brake (Joe's Post)
My strategy is a fast servo with a switch to reduce the throw for light airs which makes it effectively a little bit slower also. Avoiding the rudder brake is mostly about a light touch though.
Gerry