Sharpening Stone Holder

I do a bit of knife sharpening at home and have this sharpening system:

https://smile.amazon.com/gp/product/B015XKSNS2/ref=oh_aui_search_detailpage?ie=UTF8&psc=1

I bought some good quality stones to use with the system and wanted a way to store them where I could keep them from getting damaged and know which grit is which (especially when the lettering wears off). I made some little slots where a label can be placed. Here is an example of one of the stones:

https://smile.amazon.com/E