Hanging Spool Holder

I was searching for something to hang my spools from under a table but couldn't find anything I liked so I made one of my own. It's a pretty simple design that seems to be performing its function admirably. My plan is to have quite a few spools hanging under the table so I tried to make it as modular as possible.

It could probably be spruced up with some nicer design features but I lack artistic ability. Feel free to modify as you see fit.

I'm using the spring spool hubs from mmone (htt