Ive just fitted the TRW kit last week and Pleiades is correct, there are only 2 different types
1 with larger internal diameter
6 normal type.
Works a treat, no more clutch slip and better engagement with the new kit in.
Another thung too be aware of is where the tabs locate in the clutch basket.
IIRC the last 1 or 2 friction plates to go in, 1st too come out do not line up with the rest of the clutch pack but sit one notch over.
It will make sense as soon as you get the cover off.
My advice take pictures of evwrything before you dismantle it. Then you have a record of how it should.go back together.