I finally got it! (Patreon)

It took like 3 days to get the slots in the right spots so that all versions of these inserts will fit properly inside the case. You can see where the different slot are on the insert below. 

So this is the Full Depth version, there will be a 1/3 depth and 2/3 depth version as well. I'm going to make these in multiple heights and for each display. You'll be able to mix and match them, I'll probably also make some smaller ones that are like 1/4-tile square for small things like gems and stuff. 

Also, I'm going to be adding a way to have a solid looking back instead of glass if you want.

Does anyone have any suggestions or add-ons for these?