Customizable Wrench Holder

I inherited a few sets of wrenches lately, and I didn't have a place in my pegboard to hang them.

After looking at other models on Thingiverse, I was able to determine that there weren't any of these out there that would actually fit the wrenches I have. (Up to 1" SAE and 22m Metric box-end)

I got out the calipers, sat down, and decided to solve my problem.

I liked the idea of using holes on-center to mount the holder (so I can twist-tie or zip-tie it to a pegboard) and I liked the idea of having the wrenches evenly spaced (on center). I also wanted the holder to fit the tools I have with a minimum of fuss.
I also wanted it to be expandable in the future just by hanging a new holder with different sizing next to this one.

So with this design the wrenches are spaced on-center. The ends of the holder will have half of a space between wrenches, allowing you to butt another holder right up next to it.

It also does some rudimentary math for determining mount hole locations b