Hey guys I currently have an extra shock that is blown. So given that I race xc I would like a little better than stock but not wanting to buy another shock or pay to have this rebuilt. So my question is how hard is rebuilding one? I have done a few sets of forks on bikes and dirtrider magazine recently had a write up on rebuilding but is there anywhere I can get different valves from? I'm a 220 rider with GTT xc linkage. Any advice guys?

P.s. I have a buddy at a tire store to care of the nitrogen charge.