What's gonna rule is I've got two microscopes to go with this thing. I bought a centering scope when I bought the wheel hobs. Ostensibly you chuck that thing up in a tool holder and it lines up with the spindle and shows you bloody exactly where zero is. Looks like a bombsight through the eyepiece. But more importantly, the FrankenKern came with this: Yeah, machinist's borescope, with fiberoptic illuminator and ancient shitty CCD camera. That's a dime through an iPhone. The thread on the back of it is some crazy number that nobody uses; it's been the holdup on getting that little puzzle working because it's gonna be FUNNNNNNNNN when it's all set up. 4k video cameras that strap on a microscope are like $200 ea so yer damn skippy any views of "machining" will be fuckin' front row.