On behalf of Dima901:
Just came to say hello after great 2 years with the M7 and InsertCoin of course!
Will join the party soon, still on locked and stock (Phone from Workplace so I need some preparations).
Good luck you both good guys with your great and important mission!
Same here, I'm on hboot 1.14. I already wiped everything except sdcard but it will report error flashing. I've to wipe again like you and reboot TWRP then it started to install.
Happened to me as well with the latest OTA Hboot.
I think it's be...