That's good to know, thanks for the instructions! I remember vaguely that I've tried LibreElec without the u-boot trick before (just toothpicked it) and it didn't boot (always fell back to OSMC), but I probably did something wrong there.
Thanks for all the work done on this, really appreciate it! It's cool to be able to breath new life into an older device that would otherwise gather dust or be decommissioned.