Slow speed carbide grinder - videos

Slow speed carbide grinder. By Steve Summers.

46:36 video:
https://www.youtube.com/watch?v=UWnl0Irl94c

44:14 video:
https://www.youtube.com/watch?v=LXOPvFn6Q2I

Now I know why I kept that gear reduction motor!
I think I have nearly the same model.
Only difference, is mine just has the low speed output spindle.
Been wanting to make a slow speed diamond grinder for years.
It's unbelievable how expensive they are new.
Thanks for the inspiration.
Now all I got to do is find time to do it...