Nice idea that on showing the set-up. My only though might be to put some text in saying how far off the ground the SB600s were, and how far from the subject (roughly) too.
Really looks great. I think the microphone wire really makes the shot. It's twisted and flying in a really dramatic way, but it's perfectly picturesque. Well done. Good use of resources and setting too.
I'm guessing that the flash (camera right) was straight on with the model (punk girl), but it looks as if the flash (camera left) is slightly in front of and angled more towards the back wall. Or another light source near the scene helped contribute inadvertently.
Thanks for the diagram. I am surprised that the back wall is lit as well as it is. Then again, I have no experience with off camera flash (soon, though).
timethief@ There was a lot of jups (about 1h 30min jumping), but this is not only image I can say I like it ... there is more!
Here:
kundalini@ Flashes are in parallel position ... no rotation on wall. Just 2 flashes ... no other light sources. When lights are direct without diffusors they overtake wide angle lighted.