You might want to check out the Crockett rifle plans by Houston Harrison. MBS has them. This is my current build, although starting as the Crockett rifle, it morphed into more of a Schroyer, which is what I am told the Crockett rifle is. After doing my usual research(books, KRA discs, shows, etc.) I believe this to be true. The gun shown has pretty much the same architecture to the Harrision plans. Very pleasing to the eye and as the Sapergia boys mentioned, should be a good shooter. I did get buttplate from Dave Keck, one of his Lancasters I believe. I'm using a large Siler lock, 44" B weight Rice barrel - Dickert profile. I wouldn't know about sourcing the pipes and patchbox as I fabricate my own and Schroyers work doesn't seem to follow a pattern here. Example, some of his entry pipes have a lift or hump, some don't, same with the width and length. Ditto for the patchboxes, some seem to have a flat lid, others seem to be slightly domed - having a slight lift at the rear of lid. I'm no expert here, but those were my observations.