Looks Good and glad it worked out, I'd still consider ordering another firing pin cap just to have a extra just in case. I ordered a couple of them small "Earth magnets" off e-bay, they have a super strong hold and are small enough to not be in the way on the receiver to hold the firing pin top when putting another primer in. The magnet your using should work fine though, but if you forget it the one on the receiver will always be there.

Glad all worked out, now we'll have to wait and see how long the unit will last and hold up, it is Stainless so it should be pretty durable. You and I are the only one's so far I know of that have ordered these, they seem to be some thing more would be interested in as they do keep the primer sealed up pretty good from the elements even though 209 primers do a good job of that on their own, but the added protection is still a bonus. And having the 209 primer as a ignition source is also what I like, it's much better and more reliable than No11's and Musket Caps. Maybe other's will give it a try.

All My Best, Ron (Breechplug)