Everyone knows what can happen!
And if a M8 bolt gets crazy with an M10 nut? You don't want that to happen in your workbench.
This may be the only solution - keep them apart!
The main goal here was to make this project printer friendly (and keep things decent!). So the wall thickness is 1mm.
Hopefully your slicer will see this as a fast printable object without infill in walls, and it will print awesomely doing the walls like in vase mode.
My tested settings:
0,24 layer height
15% infill (for the upper section)
no supports needed
You will find 2 versions, a fast printable one and another a bit slower but more robust.