looks great! what did you use to design the case and and how did you make this rough surface finish? It looks very good on the outside and will be good at hiding scraches!
In your description I saw you thought the magnets were a bit too strong and it gave me an idea-
Why not enclose them in the print? Maybe take sheets of paper and layer them up until the magnet strength is how you like, measure that with calipers, and use that to determine how many print layers you’d need to make solid over the current magnet insets.
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