For Christmas, I got an Elinchrom 400Bx 2 monolight kit. I also have 580EX and 420EX Speedlites and would like to use one of them for a background light (possibly with a Rosco gel). With the equipment I currently have, the only way I can think of to trigger the strobes and a Speedlite is:
Mount the 580EX on the camera and set it to "Off" (rather than Master or Slave).
Use the 420EX as the background light and set it to "Slave".
Set both of the 400Bx's to slave.
I believe that this arrangement would allow me to wirelessly fire the 420EX which should in turn fire the 400Bx's. Will this work? Is there a better way? Am I losing any functionality by firing the 400Bx's this way instead of using the sync cord?