some kind of not perfect cutting methods this morning, but I got away with it ,, working on the boiler base unit, its will be three brass rings, with a formed (rolled) sheet brass section to get the height,, modded a drill press circle cutting tool to do the cores, once the cutter was ground a bit it worked fine,, cut the disc from each side,, lots of clamps and safety gear,, used a big bandsaw to knock of the corners,, all are just a hair big for the lathe so the rotary table will get set up on my mill,, lots of cranking that little handle..