Simple print. Only a few recommendations. Print with 3 walls and at least 10% infill.
If you're attempting a filament swap, layer 50 is the one.
Magnets were purchased from Amazon Choice kit:
https://www.amazon.com/TRYMAG-Different-Neodymium-Refrigerator-Whiteboard/dp/B09WZTSQ9Y/ref=sr_1_3?crid=3IIHW3C03DVYR&keywords=neodymium%2Bmagnet&qid=1682171676&sprefix=neod%2Caps%2C253&sr=8-3&th=1
The author marked this model as their own original creation.