Thank you so much for all the kind words! I'm really excited to get some more range time with this little carbine.
Regarding the NDS rear sight: I was very happy with the quick service and the overall quality of the sight. My only concern is that it has a limited range of adjustment. That wheel on the side is for windage. Looking down at the sight from above, we see it has a modest amount of room for adjustment, but I'm not really concerned because of the front sight. In exchange for this "problem," I see the NDS sight as being much sturdier than some other sights I've seen.
The design of the front allows almost unlimited adjustment. 44Man's idea of the plastic spacers was a great one: I should have used black Kydex -- it would have been less work and would have done at least as well as the steel. A tall front sight blade can be easily filed down for adjustment to a load. If I screw up and go too far, I can easily make another. I still have most of the first tent stake, plus about five more. Windage can be adjusted by making a very thin spacer or spacers, and change the order to move the sight blade left or right. I plan to focus on a few loads with this carbine, so the lack of a fully-adjustable rear with a wide range or adjustment isn't an issue for me.
I do plan to thread the left side of the band for a slightly larger pair of screws, to make a better-looking front.
I'm thinking of two changes to the front:
1. For light recoiling cartridges like the .38/.357, I could make a small scratch on the barrel and the band, so that if I remove it, I can put it back in exactly the same spot.
2. If I experience movement, I can either use a set screw, or I can drill a hole in the band and use a drill to make a small dimple in the barrel, so that I can put a single small ball bearing or a lead pellet in there to prevent movement. I'm leaning more toward a set screw on the bottom, if needed.
My reason for the project was to have a super-compact carbine that could be used or carried in places where a "regular" long gun can't go. I like really long or very short barrels on long guns: long for quiet shooting with light loads and short for easy carry. Nobody looks twice at a tennis racket bag!
All my best,
Dirty Bob