when you build the Pro shocks, I had to tweak the metal 'snap' ring thing to it was not as tight to get in. they are SUCH a pain to build.
I lost one of the metal clips and I am actually using a bent staple from the packet they came in to hold it all in place - seems to work
I have to say I really do think the LRP/FTX shocks are a great design (once you have built them) the bladder works really well, super-smooth air-free shock motion. they feel better than any other shock I have built... seriously!