MTG LIbrary Holder

I started getting back into Magic recently and all of my cards were falling over due to the sleeves and so I went looking for something to hold them, then I found the commander tray and I loved the counters and I wanted to use them as health counters, so I went through SEVERAL iterations and ended on this. I built in slots so the counter pins from the original can slide right in, and you can swap them out if you want to at any point. They "click" into place so they don't fall out by accident.

First thing I've designed to this point, and it's very "niche" in terms of what works for me, but I figured someone may find a use for it.