Very nice, and I commend you, on the use of stainless -- was concerned when I read that, untill I saw the pics -- As the discs, appear to be mild steel !!
Stainless, of course would not work, for discs, as they would not be magnetic!
As I live in the state of Washington, rain is a real producer of rust and I hate rust --- so my next mill, will be stainless as well !!
As Gurd asked, how will you adjust the air gap ??--- Looking at it, I assume, shims !!?? And what magnets ??
Very nice start -- keep those pics comeing -- Bill H.........