Bailey,
As usual, the novelty and the quality of your work leave me in awe. As an aside, you could sell every "in-the-rough" quarter rib that you can machine, configured to fit side-by-side guns.. After sitting all this week in my tree stand, with the 12 gauge double rifle that I built years ago,with iron sights only, I've come to the realisation that I'm going to need to fit a scope to the gun before next season. My old eyes are having a problem with the irons. To do so will mean installing a quarter rib on the gun. Since I don't own a milling machine, it will necessitate spending a hundred hours or more, smoking, filing, and scraping, to create and fit one from scratch out of a block of steel. I'd pay handsomely to be able to purchase one semi-finished, like the one in your photos. What a time-saver that would be!

Best of luck on your new project. I'm looking forward to following along.

Best,
Ron Vella.