I've been looking at seedsigner too, let us know how it works for you.
I can’t get over how awesome my #SeedSigner is! Working on moving my stacked sats from single sig to multi sig. load up all the keys on a single device, sit down to Sparrow. Test and send. FOSS, stateless. Once I’m done, the device is clear. Hey nostr:npub103m96sra82w4agghew9cdxtzs4s8sl7qsjsvw6h653yml0gjrkzqefd3h5 , haven’t heard you mention it yet, check it out!
Discussion
Stateless! You can pull the SD card out after it’s booted up. Everything happens in RAM. If a bad guy finds it, it’s a blank slate. Even if he finds the SD card, it’s only the OS. It’s built for easy multisig. Plausible deniability for the $5 wrench attack. Plus I’m a boomer, and it’s very easy to use