Yes. I'm starting the inlet. I'm not going to polish it all up then keep banging it around while inletting.
Lessons I've learned from this:
3-Having to much material and a constant whacking on the brass to get the outside dimensions smaller will really thin out the bottom of the brass. This bottom is down to (my guess) .010. I soft soldered a piece on the inside to provide strength and have enough material to counter sink a screw.
4-It ain't as easy as it looks. OTOH....it's not as hard as I made it.
If the brass thins this much, you are hitting too hard and not annealing often enough.
Please read this tutorial I did for making spurred butt cap.
https://americanlongrifles.org/forum/index.php?topic=32410.0Read the paragraph with the heading "Swaging the cup".
I started with 0.08 thick brass. The bottom of the cup is 0.075, measured through the screw hole.
When making this cup, I annealed over 60 times.
That being said, you have a good looking butt cap and soldering a piece of brass to strengthen the screw hole is good solution. I did the same the on the silver Kentucky pistols.
Best regards
Rolf