I drew up this sanding disc organizer and cut it on our laser out of 1/4 mdf. No more hunting down differing grits. Not fine woodworking, but very useful. I like how it turned out.
Similar to the 3D printed ones I made for my pegboard. I made one to hold my 2" discs and one to hold the 1x3" strips of sandpaper I cut from standard sheets and use for pens and small objects. Having them organized and sitting right there in easy reach is a game changer. These look great! In fact, I think I like your design a little better than mine for usability. Maybe I'll steal it