Jumping ahead in the resto process, I'll show the mount. It consists of 5 aluminum castings. They are very nice with little porosity and good thickness. They remind me of the Russell Porter castings (many bronze) that I ogled as a kid at Stellafane.

Only problem is the machining of the plate where the tube rings attach made the metal too thin and it cracked at the hole for the rear ring. There are small blocks that provide backup for the bolts that hold the rings to the mount.