I built that wheellock for a commission by a friend. The lock took me a month of 12 and 14 hour days when I was a lot younger, stronger, and more motivated. My friend was happy to pay my asking price of $5000, recognizing the nature of this build. I used hammer, chisel, saw and file to make the lock - no castings. I made all of the screws on a little hobby lathe my father made for me. Wheellock screws historically have a taller domed head than modern machine screws.
And for the record, I am not interested in building another one.
The stock on this pistol is ebony, and I did some wire inlay in fine silver for accent. Plunging inlay chisels into ebony is...challenging.
Thanks for the kind words.