Practically speaking, I crash much less with my rb6 with the schelle rack on the optional outer hole. Just looking for a little more turn in and low speed steering. Mid speed chicanes seem to be just as aggressive as stock but low speed pushes a little bit. However, much easier to drive. Hoping the combination of adding a shim but using the outer hole may do the trick. My opinion between the racks currently is as LA guy noted... smaller track love the kit rack. Larger track much easier to drive with the schelle rack
Yes, add 1mm or 2mm to space the ballstud forward and that will give more steering in tight turns when using the outside hole on the rack.