Nigel at Retro Engineering has done an excellent job of rebuilding the differentials in the BMW’s. The limited slip units have been rebuilt also with the ramp angles set to 30/30 and the preload adjusted. A new pinion nut and solid spacer have been fitted as the nuts have a tendency to come loose causing untold damage. The car is out at Brands Hatch GP circuit today in preparation for the Masters Historic Festival on May 23rd and 24th.