Just had 3 clutchs changed out in 2 years now.
Decided that when rebuilding the 90 that I would change the cluch friction, pressure plate, bearing and fork. I bought a B & B and this was OK until 18 months later and the clutch started slipping towing the trialer and caravan nearly leaving us stranded 600miles from home.
I then got a genuine parts clutch which was a Valeo and fitted this only 6 months later to find I could not disengage gears.
B&B looked ok just quite shiny on the friction plate
Valeo one had a part broken off it which was jamming the mechanism.
Final one is AP driveline had no problems with that one yet
Nuts and bolts are now well greased so it comes to bits real easy now !!
Tony