Kamidog, I'll take what ever you have that is at least about 1/2". Wheel locks use iron pyrite instead of flint. The pyrite drops about 1/8" onto the spinning wheel which is serrated. The serrations rip off tiny pieces of pyrite. (If you've ever sawn fool's gold with a hack saw, you know that it smokes & smolders pretty good.) The resultant sparking ignites the powder just like a flint spark would. Wheel locks fire faster than flintlocks and many, many percussion guns. Here's my film for the Swedish movie company.
[video]http://vid10.photobucket.com/albums/a109/sbooko/Wheellock%20Firing%202%20.mp4[/video]