Drawer storage system with 17.5mm grid with stackable containers

Recently I created and uploaded a drawer organizer system with grid. The system works very well but……. While using my system, I found out I needed smaller containers. The large grid in the previous version doesn't allow single small containers so back to the drawing board.

This new system has a small 17.5mm grid. Why 17.5mm? Simple. I have several items to store which are small. So I want a container which is small but also big enough to conveniently put in my finger to get the items out.

My index finger measures 22mm wide. I want some room to spare for my finger so inner dimensions should be bigger than 22mm. So 25mm? Could work. Add some wall thickness of 2mm. Add some extra space between containers and get 30mm grid. Don't ask me why but eventually I came up with 17.5mm times 2 = 35mm wide boxes with 17.5mm grid.

Long story short.

Here is my new version (actually in my van from work).

My van has ALUCA shelves. The drawers can hold 21 grid segments. That's why one of the grid bo