Technical Support wrote:
It was not on the test button, it looked too low. I have not seen any mention as to why his hands were where they were.
Ok, if it's not the test button. But can CC sitting on the flash shoe can be used as Einstein trigger?
Does it mean that we do not need CyberSync as trigger and only need Einstein & CC to trigger it?
This is correct. But it's more convenient for most users to set up lights with CC and fire from the smaller, cheaper CST on the camera. Plus the transmit distance is greater from CST due to the extended antenna.