The original model was simple and useful, but customizing it was a bit complicated for my specific needs.

You can stack these models in your slicer for different sized compartments, or you can print multiple compartments and stack them on top of each other.

Keep in mind I kept the dimensions for the top&bottom thickness, so stacking them results in a bit more plastic and thickness on the stacked shelf.

In the future I want to add a back to allow wall mounting with double sided tape, and a way to stack them horizontally as well

Should be compatible with the original model for stacking, but I haven't tested yet