So when I began chasing down everything needed to shoot this old relic, the set trigger and all the special parts it requires was a real puzzle. I scrounged images on-line, looked for diagrams, still haven't really got a good sense of how it works. One thing , though: I was very determined to use as many original parts as possible. So when I saw the prices that 1st Model set trigger sears and springs and pins were commanding ($750 on eBay..), I got out my Fabricator hat and went to work. I made a mainspring with a an angle grinder and hand files, the trigger springs ( 3 of 'em! ) I "crafted" from a quality hacksaw blade. The stirrup and pin I hand filed off a chunk of leafspring ( good steel there!) and the spring, catch and screw for the dustcover I also fabricated. The original frontsight was missing the blade, so I found an old buffalo nickel mother gave years back, and cut and filed it. Here are the only new (reproduction) parts I've bought so far. The buttplate was a raw casting from Numrich, I think. I handfit it to the worn very used stock I got off gunbroker ( $60 bucks for all that character!) and rustblued it. Would like to find a better match, appearance-wise, for a used rear sight. But for $20, that older Marbles with do.