Now to address the metalworking section of the site.
I was a machinist early in my career and one thing I used quite a lot was a bench block. However, I never actually owned one because they were readily available for use in the shop I worked in. So now that I do my machining at home, I keep thinking I'm going to machine myself a couple but it's one of those things I never seem to get around to doing. So the other day, I thought "let's see how this works."
It's obviously too light-duty for any serious work and using it as a drill guide will wear it out in short order. But I think it'll find some uses on my bench. And I didn't even have to model it since I found one on thingiverse 😉