Yes, but what I want is mid-curtain fire.
Say at the 1.5 sec mark of a 3 sec. exposure.

Lol, would require impeccable timing by the user.

Actually more like middle curtain.

And about reflexes like a mongoose, yes especially since I would like the flash to go off midway of a 1 sec exposure.

And yes, test does work, hoping for something a bit more precise then my ancient nerves and reflexes.

So perhaps until PCB adds delay to the CC or Einsteins, I am out of luck.

That's what I was going to say.

It's easy enough to do with something like an Arduino and an extra pair of radio triggers on a different channel.

The requirement is for a specific interval. Rear curtain sync fires just when rear curtain is release - so it won't work and the event has already lapsed.

The PW Multimax was designed to hand just that issue. It allows a specific delay after the camera sync  trigger. The Elinchrome Skyport control software also can set a delay after sync signal on the RX flash units. However, I've never heard of the PB units with that feature.

For a reflex capture, a set delay is chancy unless the reaction is consistent or the capture event is long enough to allow some leeway. Or you have enough time for trial and error.

Or just use PW's to trigger the Einsteins?

+1 it's time like these when I am reminded "Sometimes you can't afford cheap"; add another reason to buy PW in the first place.

+1 - there is no reason not to use the PW as your sync.

If you still want to use the CC to set the power levels on the Einstein you should be able to use it off the hot shoe for remote control.   Just plug the Pocket Wizard into the 1/8" sync port - I don't think having the CyberSync transceiver connected will stop the sync port from working.  But check the manual about that.

Except I don't think the PW can control the levels on the Einstein (or other PCB lights) like the CyberCommander does.  I've never needed mid-curtain sync, but I am constantly adjusting the output on my Alien Bees using the CC - and when you have a light 12' in the air it's a lot easier than moving a ladder into place to make the change.

Power levels can be controlled remotely using the MC2 and a MiniTT1 or FlexTT5 transceiver.  The downside is they are only adjustable in 1/3 stop increments over a 6 stop range instead of 1/10 stop increments over a 9 stop range you get with the CC. 

http://www.paulcbuff.com/mc2.php

Thanks, that would work for the OP.  I use Alien Bees which that particular part does not support - and my flimsy excuse for not knowing it exists :-)

Okay, I'll do it, if CC is unavailable.

Can you turn off the Einstein's optical trigger and use a radio trigger instead?

You could also dial down the power on a shoemount flash, that is not connected to the camera, and use the test button on the "hand flash" to trigger the Einstein at the right moment.

That calls for two hands, so the camera would need to be on a tripod.  Is that practical for this shoot?

Yes.  The slave sync can be disabled from the back panel on the light or remotely via the Cyber Commander.

If you want to use the delay function of a PW Multimax, you can get a PW receiver that plugs into the dedicated receiver socket on the Einstein.  It supports all the Multimax channels.

Doubt they will...PW's TT system needs to do that for their Hypersync hack.
CC doesn't do Hypersync because it is a hack.

You probably want some kind of arduino gadget for it...too bad the Triggertrap doesn't have additional outputs or it'd be a perfect solution (it can only fire after a delay of sensing some event).

As far as I know, no camera has a mid-curtain flash.

However, I've seen rare devices that are positioned between the camera & the flash/strobe which can introduce a delay in the triggering pulse to the flash/strobe.  I think you'll have better luck looking through flash accessories.  (Sorry, I'm too lazy to search for you).

On a three-second exposure?

"One Mississippi,
Two-"
Hit the test button.

Actually the 1.5 was simply as an example. Does not have to be that precise, but would be nice.

You can do this with PW and Canons and their speedlights. Saw this done with a series of speedlights firing sequentially. Produced a neat effect with a moving subject. Could you do similar with highspeed burst, probably, but would it be the same, I don't think so.

Mike what you describe is what I have done in tests, and it does work, just hoping there was a more accurate way to do it.

Yes.

But have the CyberSync system, and buying a thousand dollars worth of PW is not in the budge, or even make sense.

But you are right PW's will do it.

But moving the ladder around keeps you lean and trim.
And think of the excitement when you almost fall off it.

Trigger Trap would also be neat. Must get for some nature photography, or even action shots.
More $$$

+++

You could rent them when you need this capability.

Yep.
Although it will really be a 1sec. exposure. Some of the examples were just that examples.

Would be nice to fire the Einsteins sequentially with a 0.5sec delay between units.
Think any form of action photography.
Ok, I could buy a 500ws stroboscopic flash. But they are not cheap. And I already own the Einsteins. Also the one flash (in this situation) would be static, and the exposure of the subject would change as they moved across the field.

There are a number of workarounds.

I will be testing some this weekend.
PW answer is the best, but unaffordable for something that will be done only on occasion. And don't count out PCB. It is only a firmware upgrade (it is for the PW), so they may do it, just not soon enough for me.

The OP states at the 0.5 mark of a 1 second exposure.