Mitch, I think I understand most of that. First, I think you're correct that a washer on the pin for the pawl would keep the pawl, trigger, and trigger link from floating, but that's not going to solve any problems. the trigger components are too thick to have any of them slide over or under one another.The "horseshoe cam" and "roller" is what Crosman calls the stop roller and stop. It gives you a half-cock safety position (the part that extends into the tube moves up to hold the hammer away from the valve). In the un-cocked position, the valve stem is open from the hammer pushing it in. Without the stop roller and stop, you would have to fully cock the hammer to install a fresh cartridge. Not the best situation but okay if you mind the safety and trigger.This mechanism could prevent full-auto if either of the sears broke (during the shot). But you would also have to release the trigger for the stop to engage the hammer... unlikely scenario.I could show more pictures if you want.I would make sure your torsion springs have not been tweaked. The action needs to snap into place to latch. There is also a chance you're not getting enough blow-back gas pressure. The valve vent may need cleared or the hammer o-ring seal (to the valve) may need replaced... hthWyo
Hi Roger, I think all of the mods are shown here...http://thegreencrosmanforum.proboards.com/thread/96/crosman-600-modsFor more detail in assembly/disassembly see the first two links in the top post. Seven 600s?... they are addicting. I have five but read somewhere that someone had eighteen ...nice car in your avatar Wyo