Thanks! Here is a guide by a community member for using your own firmware:
https://github.com/Gangleri42/seedhammer/blob/main/docs/howto-bootkey-and-signing.md
seedhammer / SeedHammer
npub1z0…8wfm4
2026-08-02 13:48:55 UTC
in reply to nevent1q…uhf6
Author Public Key
npub1z072s0nvldeva7a6qek3kj358f0h5gm640kkllkk52h0qrjtnw8q38wfm4Seen on
wss://relay.mostr.pub