Thanks for your interest. These are really neat guns. Once on the bench, the lock and barrel were removed. First, the nipple was taken out, next the bolster was ground off flush to the barrels flats. This also exposed the flash channel, which is now the touch hole. The grind marks were dressed off by filing neatly but not prefect. Each workman was supplied with trays of miscellaneous flintlock cocking pieces, pans, frizzens, springs and screws. Before totally disassembling the lock but haveing removed the hammer , various flintcocks were tried. They had to fit the tumbler and have reasonably good half and full cock geometry. The original tumbler scew is reused. Next, a pan is fit into the notch once filled by the bottom edge of the bolster. An internal screw holds the pan in place. A frizzen is then matched to the progressing assembly. The hole for the screw holding the frizzen is nearly at the edge of the lockplate (they're realy cramped). Finally, the frizzen spring - holes are drilled for the screw and support peg and then installed. What I'm not 100% sure of is did they remove the main spring to do this work. Also, these lockplates are hardened, yet they are drilled and tapped as well as having roman numerial assembler marks filed in each part including the plate. However, they show no signs of having been annealed. Remember these were done quickly at little expense. No two are alike as they were made from obsolete surplus parts yet worked really good. The workmanship of these Liege articifers is easily on par with the modern India repros by comparison. Building one from a repro would follow the same steps. There are no measurement. All this work was done by eye. I do have good 35MM photos but at this time no way to scan. Given time I will. G.S.