Hi,
The trigger plate is made and trigger installed. The plate is about 3 3/4" long, 13/32" wide at the front and just under 5/16" at the rear. It is made from 3/16" thick mild steel. Originals usually had a round boss at the front that the tang bolt screwed into but the steel plate is sufficiently thick to have plenty of threads for the bolt. Also, the tang bolt of a standing breech is rarely unscrewed so wear is not an issue.
The trigger I am using does not require a large slot in the plate so the trigger assembly looks very tidy and professional. The plate is inlet below the surface of the wood so the front of the trigger guard bow that rests on it can be inlet into the stock and so the rear extension of the guard can conceal the rear of the trigger plate. When the guard is fitted, the middle lug on the guard will fit into a slot in the trigger plate behind the trigger. It will either be pinned through the stock or the lug will be shaped into a hook that hooks on the trigger plate to hold the guard in place. There will be a counter sunk hole at rear of the trigger plate to catch the head of the bolt that goes through the wrist and screws into a boss on the back of the silver wrist escutcheon plate.
I drilled the tang bolt through the standing breech, stock, and trigger plate. I am using an 8-32 tang oval head bolt from TOW. I counter bored the hole in the tang so there is a vertical shoulder in the hole that the screw fits down into rather just an angled depression created by a counter sink. I did that by drilling a hole partly through the tang using a drill the diameter of the bolt head, then inserted a smaller counter sink into the hole to cut the angle on the bottom to match the angle under the bolt head. The head of the bolt was slightly oversized so I turned it down on the lathe to the right size, which gave it a little shoulder matching the shoulder in the counter bored hole. The originals were done similar to this and it allows you a lot of flexibility to file and shape the head of the bolt to match the tang.
Next after installing the bolt and tightening it down, I pinned the trigger. I used a 5/64" drill for the same diameter spring steel pin. The trigger is pinned very high and hangs gracefully below the stock. It is a really nice complement to the gracefulness of the stock. I included photos showing the state of the butt stock and with one side wet to show the figure.
Next up, trimming the fore stock to final dimensions, shaping the lock panels, and then making the silver side plate and wrist escutcheon.
dave