Well, parts came in the mail yesterday. I also ordered a heavier recoil spring set. In fact, I called Eric Monday and asked for the springs as an afterthought. He had my hammer already set to mail, and was kind enough to add the springs to the envelope in advance of my payment. Order Monday- receive Wednesday. Can't complain about that. Thanks again Eric!
Anyway, installed the hammer this morning, with only one hiccup. Eric mentions several times in the video that if you're not careful removing your punch with the new hammer installed, you will bring grief upon yourself. He is correct.
Here is a better explanation. Look at items 15,16, and 17 HERE.
#16 pushes on pin #10 with quite a bit of force, and it is cone-shaped. It wants very much to escape between your punch and the pin, which has a slight chamfer on the end. Make sure your punch is the same diameter as the hole, and hold the pin and the punch together as you work them through. If you hear a little snap, you're screwed. The spring and follower completely block the hole, and there is no way to push it back. #15 fits into a blind hole. I found a piece of plastic the diameter of the pin hole and made a little slug that fit in #15 to hold the spring out of the way. Then I pushed the slug out with the pin, while working from the other side with a sharp probe. As mentioned, it was a pain in the ass. Hopefully, this will help.
As for function, it's everything he promised. The trigger is much improved.
Range report coming soon...