Hi Ya'all. I recently purchased a Pietta Colt Paterson replica and had it jam up due to percussion caps getting into the mechanism...my fault--I didn't know better at that time. I do now! Long story short: The smashed percussion cap wound up breaking the spring end of the cylinder "bolt." This I replaced. I also ordered some other small parts--just in case. Anyway, I just want to know one thing. Will some knowledgeable person please tell me the relationship of the handspring to the hand...on a Paterson? Does the spring push the hand from the top (meaning backside of the hand) or does it push it from the bottom side (meaning from in front of the hand)? Thus far, I have found no diagrams that are clear on this point. Yeah, I know I should have watched more closely what I was doing when I disassembled the mechanism, but you know how that goes sometimes. The bolt and other parts work as they should...drop when they are supposed to drop and lock when they are supposed to lock. Once I install the cylinder pin, however, the bolt stops working properly (does not retract) and I cannot slide the cylinder in place. Ideas please? There are no gunsmiths here that I can use. I will be forever in your debt.