Cutter
Many thanks for the reply.
I like the idea, but sadly the receiver for the Elinchrom is an in-line connection from the wall power cable to the back of the flash block only - hence ideal for the 2 Elinchrom, but no way to fit for the 580.
I do have an Canon OCF cord to put one 580 about 1m away from the camera - a flash sensor may trigger the other 580 off. Sadly, I then lose the trigger function to the master Elinchrom as the OCF cord fits into the camera hotshoe...
Grrr