Thanks. I have an Evo XD freehub and found an old Evo axle at work. Going to see if I can retrofit them to my pro 2. The diameter of the Evo freehub where it interfaces with the ratchet ring in the hubshell looks very close (and also the pawls and springs are the same between pro 2 and Evo) so it gives me some hope (no pun intended) that things might fit together.