I'm not sure this latest update is right.
It backed up the 3 img files to folder EFS_Backup, which all 3 were the same file size, 780kb. And it never created a flashable zip. I thought the second version did.
And if I were to follow the directions in the OP to restore... I don't think it will restore.
Am I missing something? Like the flashable zip that has the "backup????sh"?
Edit. I just reran it and still don't have the "efsbackupflash.zip anywhere.
I do see it in the ZERO.zip though. So do we use the Zero_EFS.zip to restore it now?
If I, or anybody else helps you, remember to hit the THANKS button.