[jspatz1]

In my opinion yes, the roll pin will be much tougher than the screw and is the reason for dong it. Roll pins are compliant by their nature and built for shear loads. Cap scews are hardened and brittle by comparison and as mentioned the threads provide a stress concentration point for it to fracture. As long as you keep a punch and pin on hand to replace them if needed, I think the pins can be left in indefinitely. We have two that have been through two years service with no problem.

The suggestion to leave the cylinder nut loose is exactly right. The AMshifter asembly is not always perfectly alligned and any tightened misallignment will cause it to bind. We had a shifter assembly fail at champs once due to this binding. The pneumatic force on the shuttle is enough to damage itself if it binds. Rather than Loctite, we add a tapped setscrew hole to the cylinder nut, and lock it in a loose position with a setscrew.