Stackable drawer system - no hardware required for assembly

I was a bit fed up with lack constantly growing count of new screws and bolts in the organizers and buying new ones, so I decided to design my own system. I decided to recreate it from scratch, highly inspired by the system I have seen on printables.

Each train can fit 6x7 boxes of the sizes of 3cm x 3cm. I also designed boxes to hold longer screws:

• 3x3
• 6x3
• 3x6
• 9x3
• 3x9
• 6x6
• 6x9
• 9x6
• 9x9

Please follow the below links if you would like to print the boxes with screw specification labels:

3x3 set 

https://makerworld.com/en/models/150292#profileId-163962