I picked up two Pro-Lites for $10.  One works (worked) and the other was used for parts.  I've been tooling around with the "working" marker after I finally used it, then it took a dump on me (started burping) during a game with a full tank.  I replaced all the o-rings, but I am missing the velocity screw.  I found a previous post from another member who was having the same issue, so I will go down the list and try each solution out.  The marker is now a work in progress, as I am waiting for the parts to arrive and then trying to get the issue resolved. 

My other problem that I need recommendations for:  I was hoping to get the "parts" marker up and working but somehow, the previous owner had managed to strip the bolt of the gun valve fitting that secures into the valve assembly, so I can't even get the marker apart.  The "parts" marker is in decent shape and needs a few parts (missing the front bolt and velocity screw.)  Anyone have any ideas how to remove the gun valve fitting?

Also, both markers, are missing their safeties.  Although I use this as my safety (motions with trigger finger,) I probably should replace them so I don't catch any grief at the field.  I didn't see any on TippmannParts, does anyone have any recommendations on where else to look?

I switched out all the o-rings, replaced the missing velocity screw, and put in a brand new power tube.  Now the    is releasing propellant/CO2 through the barrel/power tube.  Tell me if I am wrong, but I am guessing that I need to replace the valve.

With the extra money that I am dumping into my "working" Pro-Lite marker after it took a dump on me, I am scrapping the idea of getting the "parts" marker working.  The nostalgia of owning and using a Pro-Lite has become bittersweet.