Eric, I made two wheels from oil hardening steel for this wheellock. One is serrated for pyrites and the other, smooth, for flint. Neither has worn out , though the flint one shows some wear, of course. They both spark like a cutting torch.
The case I made for this pistol is of Philippine mahogany. It is soft and not very interesting wood, but with a reddish stain and some finish, it looks ok. I used a material called "velvetine" (sp?) to cover the partitions.