I recently tried to service a campag freehub, doing the whole floss around the pauls and then insert back into the hub technique, but I found it impossible to get the freehub casing to screw back into the hub (it has threads right on the bottom which I am assuming are meant to screw into the metal part of the hub).
I don't think it is because the pauls are moving about in the hub, they seem to be in the correct position, making the right kind of noise, but still I can't seem to be able to fully insert it.
Apologies to bother you, or if the answer to this is blindingly obvious, I've tried to search online but have had no success.
I've attached a photograph, the bit just below the protruding bottom part of the freehub is the part which suggests it is meant to screw into the metal hub...
Thanks in advance, help greatly appreciated,