In case you ever run into HSS (high speed synch) issues on the Nissin Di700A. When directly mounted on camera (rather than firing wireless), the flash has to have a 90° orientation. If you bounce it off the ceiling, etc. it won't work.
In case you don't know how to enable HSS on the Nissin Di700A on either the flash itself or when using the wireless transmitter, press the test button for 3 sec and then the LED will blink twice every now and then to let you know you are in HSS mode.