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Using my cooperative-by-meal-placement calico, I was able to test out how well my di700a would work with my new Yongnuo YN560 IV as a slave. It's a pretty good wireless setup. I'm using the Nissin Air Commander to trigger the di700a wirelessly. Then I have the Yongnuo set to slave mode and is triggered by the di700a's flash. The only issue I noticed involves using high speed sync. The di700 will trigger the Yongnuo in HSS mode if both flashes are set at full power. It seems if I decrease the power on the Yongnuo at all, it no longer fires on time and doesn't show up in photos. I haven't played around with it too much though, so maybe I'm just missing something.