This is a modified version of @AlastairGreen_326352's KO II Shelf to take magnets. I wanted to be able to mount it on the side of my server rack which is metal. It works great and has more than enough magnets to hold it. I also put some blue tape on the back because I dropped it and chipped a magnet, and I don't want it to potentially scratch the rack. No tape would be needed if the magnets aren't cracked.
Magnet size is 60x10x3mm and 6 is probably a bit overkill, but oh well. :)
Here is a plain, non-affiliated Amazon link to the magnets I used:
https://www.amazon.com/MIKEDE-Neodymium-Magnets-Double-Sided-Adhesive/dp/B0772PFC89?th=1
Thanks again to @AlastairGreen_326352 for a great design! Prints very easy, I used PETG, .4 nozzle, .2 layers, 4 walls, 25% infill.
Cheers and thanks for looking!
The author remixed this model.
I added six 60x10x3mm magnets to the back to be able to attach to a metal rack.