Originally posted by Ash SOldbear, is there anything in the setup that varies from the usual wireless setup procedure for these two flashes?
I don't think so. Set up for two remote flashes is the same as for one remote flash. The only thing to make sure is all remote flashes have to be on the same channel.
Originally posted by Ash Both flashes synced with the camera body in SL2 mode?
No. They are in SL1 mode. I don't think they work in SL2 mode ("dumb" optical trigger) because the p-TTL pre-flash strobe from the built-in flash will trigger them. Note that the built-in flash is always in p-TTL mode unless the lens is an M-lens, in which case the built-in flash will fire with full power.
Originally posted by Ash Works in P-TTL or only in A/M modes?
The test is in p-TTL mode. I didn't test in any other mode.