Go AE's website and dowload the FT SC10 4x4 manual. AE added an additional o-ring ASC6469, which is the same o-ring used in the 2wd shock caps and other shocks, that goes between the shock cartridge body and the shock body.

Also, make certain the tapered side of the shock cartridge is pointed up as on page 24 of the FT manual and page 21 in the Team version. I also wait to tighten down the shock cartridge cap until after I've inserted the shock shaft. I turn the shock shaft as I'm inserting it so as to not "scrape" the threads past the x-rings, possibly damaging them.

Also, make certain you aren't damaging the shafts with pliers or something. I hold my shock shafts with diagonal side cutting wire cutters right above the top thread of the shaft when I'm threading on the shock rod end. Others use something to protect the shock shaft, like a cloth, to protect the shaft.

Steven