Stacking Small Parts Case with Gridfinity Support

As a watchmaker I am always looking for better ways to store tiny things. After being up happy with what exists in the market I decided I would make my own solution. I had a some criteria that was critical for me:1.) It needed to be modular and expandable2.) It needed to securely keep parts in place and organized3.) I wanted to have the option of being able to use it with gridfinity The case is 170.70mm x 92.20mm x 33.60mm. It can house 3 short trays, 2 medium trays or 1 tall tray. These trays are bevels and captured by their handle so they positively fit into the tray above it and below it. When the case is closed there is no movement and all parts stay in their respective compartment. The handle of the top most tray also acts as a registration point for another case to be stacked on top. This allows you to quickly stack cases on top of each other while keeping them from sliding off. Gridfinity Support:I based the tray design to fit perfectly inside a 2x4 standard gridfinity tray. I i