A magnetized knife rack is a great idea for RVs. Did you print a wall mounted rack?
My garage refrigerator holds some magnets ready for use in projects! Mostly from
K&J Magnetics or
https://supermagnetman.com ... probably a 100 or so disk drive magnets strung about my place because I use them for so many things. My RV access panel screws were replaced with magnets and it sure speeds up getting into those spaces when needed.
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