I have blown the seal on my shock... oil on the bumper and it thunks pretty good coming up on full extension... 620 RXC I would like to rebuild this myself and need to know what are the wear parts in an LC4 shock absorber... I know it's not the same as a PDS shock. How much of this can be done without any special tools(?) besides the filling with nitrogen? The bleeding can be done... with care taken, by hand. Disassembly should be OK, reassembly should be OK, or, are there tools needed for the shaft seal? I have a spare shock (with lots of hours) and an Adventure shock that I'd like to lengthen (take a spacer out) that will also need attention. Can someone chime in with some advice pls?