Seedsigner and stainless steel washers only. Fully offline. Full FOSS not commercial products.
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I’ve been eyeing the CoinCard Q and a StampSeed titanium plate which for me seems like a good start into the BTC cold storage realm. Seedsigner is definitely bad ass a something I’m going to invest in the future. I’m not a super tech savvy person. How hard or easy was it for you to build your Seedsigner?