Ah, I understand now what you meant. Don't think that would apply with 41 for sure and for the 'regen' reason you've said. Not everything is rewritten to 41 on reboot after erasure however which is why a good backup as a BIN is so important. Interestingly, it doesn't seem to matter how old the backup file is either. It can be years old and still used to successfully restore/overwrite (xrgn) a corrupt or empty 41.