Sorry Ray, Bader was what I was thinking about. A shop I worked in that made custom hand rails and stair rails had 3 of them and they did look like KMGs, but solid cast iron frame if I remember correctly. They had extensions for small wheels. Those things ran 8 hours a day as no weld went out of our shop that looked like a weld. They were not weak machines Ray and are still running according to an old co-worker there.
Walter Sorrells uses one he has had for at least 15 years or at least the motor is. Here is his video showing an old Bader and it doesn't look like a weak grinder.
https://www.youtube.com/watch?v=yfa9q-K4BK0&t=682s
Sorry about the Burr King mix up, I remember they made the square wheel grinders and in the 90's had an open motor option, stupid for a metal grinder. Doesn't save money if it explodes.