The book is on the way...Also emailed preferred barrel blanks. They said that they can turn custom barrel blanks to fit the inner diameter of my specific barrels for ~ USD $295 a piece. They can also thread the muzzles, crown the barrels and create muzzle caps for an additional $80 a piece. I don't think this is too bad, considering the man hours usually required to turn something like a barrel down on a lathe & threading. Also, I wanted to be involved in the conversion, but cutting the man hours this way seems pragmatic. The only thing is, they need a schematic of the inner diameter of the barrels. I was thinking of doing a plaster or plastic mold of the i.d. then, measuring the mold/s. I wish there was an old blueprint online, like at Numrich's that would tell me the exact taper. Because, the bore goes from about the extreme of 15/16 at the breech to 13/16 at the muzzle. I probably should contact Mr. little bespoke gunmaker also, as he has assuredly already ran into these problems. I also, have an old Boito that has relatively the same dimensions I could test chamber pressures on, after headspace reaming, and I don't mind it blowing up before the final proofing on the Stevens.