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If you're worried about the magnets shattering, you could look into sourcing rubber or polypropylene coated NdFeB options. Once coated they are pretty hard to break, but you'd probably have to jump up from N42 -> N52 to get the same magnetic force at the holding distance. That said, I directly epoxied a set of uncoated (Ni finish) N52's to my Steck panels and haven't had any issues over the past ~2 years.