I have an older Nissin 5000GW Pro flash that looks a lot like the picture above. I plugged it in via the PC cord and shot this photo.

http://www.apug.org/gallery1/showima...mageuser=52114

And I used my AB400 with a Larson 4x6 softbox and shot this one last week as well, I held the shutter open a little longer for more ambient light which caused the blurr. I still haven't perfected the use of a flash with my 250/420 or 104...