Had 2 Black Diamonds and they came set up for them. If you look at the striker face, you'll see a small nub in the center. That's enough to fire a 209.
I drilled the bolt and pressed in a piece of o2 tool steel for a firing pin. I turned it on my lathe to set the depth. I think i went with 0.30" protrusion. This was for my TC System 1 50 cal. You just have to use the Black diamond 209 nipple for it to work.
I also turned up a new bolt to have on hand just in case I switch back to musket caps