[Closed] Shimano freehub, service or replace

Hey,

My freehub was playing up tonight it wasn't spinning freely and was slow to engage. If i took my feet off the pedals while moving the pedals started to turn quickly.

Is it possible to service the freehub or is there anything I can do to prolong the life. It's over 2 years old and I this is the third winter so it is probably just worn.

AS shimano stuff is now gone through the roof in price is it possible to fit a lower end (deore) freewheel onto an XT (FH-756) hub. Failing that anywhere do them cheap? It seems that £35 buys me a new hub so I can swap over all the bearings, QR and seals (keeping a spare hub body) yet £25 buys just the freehub.