I found AFCO's new site to be a PITA. Anyways, I was watching a youtube video and they came out with new quarter midget shocks and the adjuster is a click type that clicks in every 1/4 turn. I had a look to see if they made a larger version, no luck.
I also was just floating around coleman racing products website last night and found shrink on shock thread sleeves. Heat them up, slip over shock, cool. No worry about the threaded part moving when making changes. There isnt enough website info on what shocks they will fit though so an email or call would be needed.