Hi. Bought a replacement esc board for my phantom 3 pro.(part 33). Inside the box was instructions warning of compatability issues with the motors. The instructions indicate that the old board has a label with 044xA and the new board (for the new motors) has a label 044XB. However on my replacement board is the label 044xC, can this be used with the old motors or do I have to upgrade. Any ideas please.