D&D Dice Holder and Spell Slot Counter

I designed this box with pull out drawers to keep all of my D&D dice organizer and easy to access. Each drawer fits 15 dice and there is an additional drawer that is used to count spell slots. Each slot corresponds to a coin and when a spell is used the coin is moved to the discard section at the back of the drawer.

The drawers were designed to fit dice that I bought by the pound off amazon. I imagine the dice dimensions are fairly standard and are listed below. Scale the drawers as needed if