Has anyone done this brake upgrade? I have 312's on the front, with a Tarox 6 pot kit sitting in the garage waiting to go on, but need to replace the rears on mine and fancy upgrading to the stronger wheel bearings in this set up. Only problem I have noticed is the carrier mountings and stub axles are different on the MK4's as the caliper bolts direct to the rear beam and not hte stub axle as on the MK3's. Any advice gladly welcomed !