Luke R did a great job with his model, but I had a whole stack of 6x3mm magnets that I wanted to use so I didn't have to buy more, so this allows you to choose how many. My posters are hung using 10 magnets due to being on a sloped surface, but they aren't going anywhere!
I have also reduced the height of the mount from 12mm to 6mm as I wanted them to be almost flush. I have not included space for the rubber strip, but it'd be easy to add back if you need it!
No supported needed, and mine are strong at default settings and 10% infil. I have used PETG to make sure there is no sagging in the summer months.
The author remixed this model.
Reworked to use 6x3mm magnets
Half height of the original
Includes blank template for your own magnets