Yeah, one of the great things about SeedSigner is that it really breaks the normal hardware wallet mindset where people think "this device IS my bitcoin!!" I thought that way for years. The key / mnemonic is everything. The device is indeed secondary. Disposable. Just a tool. Load the seed into a SeedSigner or buy any new hardware wallet and load it in there. Note that you can also use a SeedSigner to create as many new keys as you want. Being able to create and use an infinite number of keys makes it a great tool to screw around and try to set up your own multisig. Screw things up along the way, toss those keys, start again, do it better, do some test txs, build confidence, toss the whole setup, do it again from scratch, build more confidence, then build the "real" setup, etc.