I'll be doing a video on the makings of the gun shortly. Basically, I retroverted an Armisport M1842 to look like an M1840 flintlock that Hewes and Phillips had converted to percussion. The guns are almost identical. I got an M1840 lock plate from The Rifle Shop. I had to splice in wood at the back of the lock mortise to allow for the longer, pointy 1840 lock plate. And of course to match on the opposite side of the stock. All the M1842 lock internals and hammer transferred over. I had to design and have machined a new breech with the H&P style bolster. And I replaced the cast-in front sight bead with a correct soldered-on brass bead.