I use the shelves to hold minis to paint. When there were multiple on the shelves they'd catch on weapons and such bringing more than one mini with. I made the shelf deeper and added a lip to prevent hitchhikers.
Print settings:
The 0.20mm layer structural default in Prusaslicer work well on either the XL or MK3s+.
The author remixed this model.
I wanted a lip on the front of the shelf and also a deeper shelf for more minis. The lip prevents minis being taken off the shelf from hooking others and dragging them to their doom.