http://www.zdspb.com/media/skr03/maintenance/shocker_diagram_he2.JPG
I find that one a bit better
Just navigate through ZDSPB to find your bolt, the one I've put up is a smart parts turbocharger (high efficiency kit) it is the current version (black bolt) but the difference between the bolts is only the bumper which only needs to be replaced when it is worn, SP say 10,000 shots, mine has been 100,000 easy, all depends from gun to gun, I've seen some go as regualer as the 17/70 on the rear of the can, some like mine never replaced in their lives, I think this is classed as rambling, I'll shut my face now
Balf