Dave,
Thank you for taking the time to post the photos.
As luck would have it, the sideplate in your 6th, 7th and 8th photos is the one I have copied for my build. I have adjusted the dimensions to fit my side panel and am ready to cut it out. I did not have the top-view photo or the one with the plate removed and those help. My impression is the plate is perhaps 3/32" thick and stands about 1/32" proud of the wood. The edges appear to be slightly rounded or softened (not beveled or square). I had thought the tail might not stand as proud as the rest of the plate, but the top-view photo appears to disprove that.
Do you think I have it right?
I have 1/16", 3/32" and 1/8" brass, and am unsure which would be best, but am leaning toward 3/32".
Edit
I see the plate in the last photo is clearly beveled and likely stands a little more proud. The plate in the first photo appears to stand quite a bit more proud and have very rounded edges, so I guess there are multiple equally appropriate options.
Thanks again
Laurie