Photo Slides Box

This is my first (very basic) attempt at making a compact photo slides box. The box holds 40 slides, having 4mm spaces for each slide - leaving some wiggle room - and 1mm spacer guides in-between each slide keeps them from touching. The basic design is based on an old Foton slide box that holds 100 slides (in 4 rows of 25), which was a bit too bulky for my needs.

Updates and iterations may come as needed.

This was made in TinkerCad.
https://www.tinkercad.com/things/4eIKK0bl8v6