I built one, 72x2 w/ 3hp 3ph motor and a VFD, made mine tall and not so deep as most, with the motor under the desk. Consequently the desk space occupied is only about 60mm x 500mm.
At full speed it's unreal.
At slow speed it's really useful too.
Never used a bench grinder since, it's a zillion times better - faster, more flexible, better finish, easier, faster, etc etc
