Sorry to say; are you reading at all?
G7** firmwares are only for OEM/rebadged drives. BenQ's own B7** are the mature and the best. No need for any .CVT, no nothing.
Find BQFlasher and any BenQ 1620 .exe firmware and flash. Simple like that. :bigsmile:
Okay, adding a link to BenQ stock firmwares, linky.