Welcome aboard. First and foremost their kits, as well as those from MBS, pecatonica, and a couple of the others, are not kits, but collections of parts for a certain style of gun, there are no assembly instructions or plans unless you order them. Track supplies very high quality, as does the others mentioned, and generally good phone support as well. Barrels thats a good one the best are rice, getz, rayl, goodwein, and then green mountain, and some others. The only thing I don't like about green mountian is that they don't botton tap their breeches, which unless you invest in the bottom tap leaves you having to pay to getr done. The best kits, locks, and barrels with one stop shopping is Chambers. I have at one time or another bought components from all of them. My next build will be a stock from Pecatronica, a barrel rebored by Ed Rayl That's 160 years old, the lock, and metal parts will be from MBS or Track depending on availability. So do some research get two or three catalogs, and some build books, and ask more questions, and most of all have fun with this desease. That's my opinion, for what it's worth Bill