I have the solid bushings wich made shifting more precise (les wooblier than before) but still hard to get in a gear fast. Removed the flow restrictor, installed the USP stainless clutch line (not only this one didn't bring any benefit but the rubber gasket broke and my pedal went to the floor on my way to Hungaroring, one day before the other event that almost destroyed the engine), replaced the clutch bearing, went through 2 sets of Sachs racing clutches (changed the first under warranty for exactly the same reason). While my car was under engine repairing, I've also installed a spacer in the gearbox, where the input shaft sits but I'm yet to see if it cured the problem !