I couldn't tell you, honestly. That would require some research. All I can go by is what I have been told, and that is that Qualcomm uses something called "Secure Boot" or SecureMSM that sends you into a nonrecoverable boot loop if you modify the boot partition.
Come to think of it, was the OVs bootloader even locked? If it was, wouldn't we have to had unlock it before flashing a recovery? All I had to do was root and flash, nothing tricky required at all.
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