There was recently another post on SN related to this:
Best Metal Seed Phrase Storage Comparison (Cheap VS Expensive) | Jeremy Dance #16204 https://www.youtube.com/watch?v=Gi0TRyVqHG8
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Here's a post on SN about the Blockmit:
Make your cold wallet with washers | Blockmit.com #9266 https://blockmit.com/english/guides/diy/make-cold-wallet-washers/
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