It take a couple of tries to get all the pins and such back in the holes. Then you sort of massage the whole thing back together. Notice the position of the cocking lever, and you have to have the BB follower pointing upwards to align with the slot it travels in. You need three hands and a helper monkey to get it all back together. I reinserted the valve and lined up the transfer port. See how the extension snaps into the piston where normally the seal snaps in. So I replaced them and screwed it back together. The inlet and exhaust valves were good but the o-rings needed to be replaced. It's basically a 760/1377 piston with an extension.
