Word of advice:
Whatever you do, do not over-tighten the PFP shaft ! It holds a circlip on the threads that is supposed to act has a stopper when tightening both halves, the threads are very fragile. In theory, when done properly, this should give you the 26 clicks on the compression adjuster, if not, you need to adjust :
I think the engineers at Marzocchi could have come up with a less prone to mistake/damage solution than this...