ViewMaster Reel Storage Box

Do you remember ViewMaster?

Like this: https://www.uncommongoods.com/product/create-your-own-reel-viewer/474350000000?utm_source=google%20surfaces&utm_medium=organic&flow_country=USA&gclid=CjwKCAjwl6OiBhA2EiwAuUwWZbGrHZ77HpDkKt6R-n5q5TjZm4vEwtfyoBI64TY39qhcdlwDI-esOxoCeTgQAvD_BwE

This is a specialized little storage box for the circular "reels" of 3d images that you view in your ViewMaster

The lid stays shut by using 8 small magnets that you simply glue into the recesses.
I used 10mm x 1mm magnets

I've rendered it down into stl's for a few different sizes, but here's a link to the CAD for the model:
https://cad.onshape.com/documents/24e9bd9be2daad946e164ba8/w/9aeec83eec42d774c1886809/e/5b7e9405784cfe0741b6bf4d?renderMode=0&uiState=6449ac24331d906b56ef90a9
I was careful to make it easily modifyable just by changing a few parameters:
1. The number of slots (how many reels it holds)
2. Size of the magnets used.