I have a set of YN622C remote triggers. I am wondering if I can mix it with RF-602 triggers, in order to fire remote flashes in both ETTL and manual mode? For example, let say I have 2 remote flashes with the first one mount on top of a yn622, and the second one on a rf602. If I stack a rf602 on top of a yn622 on my camera, will I be able to fire the first flash in ETTL and second flash in manual power?

