Doug, that is a well-made, useful, and beautiful part. I love it.

This is not a criticism, but a curiosity. I have a nagging concern over your surface grinder placement. Maybe you have defining reasoning that I can't know for placing your grinder like it is, but I saw that and it made me hesitate. It's common practice to turn the surface grinder so there's a backstop behind the wheel. That's so any broken wheels or thrown parts don't fly across the room and hit someone or something, but into a solid stop, like a wall. I've been using surface grinders for 20 years (before my wreck), ending my career working from a Jung CNC profile grinder making one-off and short run parts (it's most commonly used for jet engine turbine blades). I've knocked away parts and broken wheels a few times, and there's a lot power behind the projectiles. Your thin metal wall could be reinforced with an alternate material directly behind the grinder.