After the slipping clutch fiasco in Race 1, the gearbox has to come out. A pain but its been out a few times before s oat least the bolts will come undone. Once out the clutch while low is not as bad as it could be but there is a film of oil around the casing and it looks like the oil has come out of the o/s drive shaft seal in the diff. This is unlikely but with the rear gearbox bolt missing too could explain why its slipping and there is no sign of a leak around the rear crank case seal behind the flywheel.
A new stage 2 clutch and new diff seals ordered hopefully we can rectify this fault next week.