Jim, thanks for posting these pictures of your work. I love to see a well done Hawken rifle and this one is just such a piece. I know it will be stellar when it is done.
I have used Davis' lock many times, and I see it used on Hawken rifles all the time. But the hammer offends me. I've never seen a picture of an original Hawken with that big fat hammer. Rather, their hammers were slender and long, and there is such a hammer in that casting. Sure, that hammer will bust a cap, but you are going to such lengths to create a super rifle, I'd like to see you put a file to that hammer.
I'll see if I can find some images to reinforce my observation.
The last picture illustrates the filing of the lock plate forward of the bolster that was referred to in a posting above. I have treated this area both ways, but prefer the tapered effect. The point is, there are no wrong answers here.