Drilled MG-1/2 to size for bushings, using bimetal holesaw, otherwise as per plans. I had misinterpreted the advice of some well-meaning meathead and ground the outside of my hole saw flat. Hole is too small. Grrr. Buy an new holesaw and second hole is good. First recovered by filing.
Drill out MLG Tabs the same way.
Trial assemby of all. When MLG Stud was inserted holes didn't line up! Removed all, had a think, reamed out the offending holes until Stud slides easily. All placed in position and level and alignment is fine!
Floxed in MG Bushings, held in alignment by Studs, hopefully protected by assembly lube.