Pluggable Mini Shelf V2

This is a redesign of my own plug-in mini-shelf
https://www.thingiverse.com/thing:4931430

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This is a plug-in mini shelf that you can mix and match as you like.
I use it for my printed Benchy variations and other stuff.

With the mounting brackets you can hang it on the wall, you can use the panels to get a smooth top without rails.

The size of the cubes has remained the same, so even printed drawers can still be used.

Improvements to the previous model:

- The dovetail connectors have been positioned in such a way that the individual parts also slot together offset by half the width. This came after a suggestion from GRAYLINN on Printables:
https://www.printables.com/de/@WinterGray_319388
Thanks for that :)
- there are half-width mounting brackets to match
- There is a cube in double width
- The inner back has a small bevel on the edges, this softens the transition from the back to the walls when printed.
- I have designed my own drawer for it. I also got th