Actually yes I have. When I bought the boat, the rudder pivots had already been re-drilled to establish more forward rake (less helm) for spinnaker. After I got it and was disgusted with the amount of slop in the rudders, I bored out the castings, inserted nylon bushings, and replaced the rudder arm/crossbar unions with the rubber joints like the Bimare F18HTs. I am proud to say that I have practically no slop in my rudder system now (although I have to wrestle with the hotstick to get it to extend since rotation of the cross bar is no longer limited). The boat sails very neutral upwind with forward weight placement.

Having steered the I20 in comparison (I imagine the I17 is similar), I agree that the 6.0 is a much 'heavier handed' boat in that the I20 felt 'twitchy'. I felt in control on both of them but the I20 is much more susceptible to driver error and demands proper main sheet etiquette during tacking. It's close but I still prefer my 6.0.