Thanks to 4T5GUY, apparently my lack of a part problem has been resolved (however, also thanks to 4T5GUY, I've become very conscious of my "love handles").

I do have a couple of questions. For the hammer assemblies that need to have the stirrup swapped, how does the stirrup attach to the hammer? I've heard people say the it connects with a pin, but if so, what retains it? I read a review on the Brownell's site where a guy couldn't get the "pin" out, and instead ground the stirrup down to fit Is it a rivet of some kind?

Thanks.