Sequential explosion timing help...

[Yuhg]

I actually managed to create 1 particle per poly from the mesh in the image I posted, so I now have a good result for multiple vertical bursts of that, plus multiple particles on each face for another variation, so the last one I really need is this sequential move, so I'm pinning my hopes on your suggestion
Just from reading I can see it working, so I'll check it in the morning and report back if I have questions.

Thanks for finding the time to help me out.
I budgeted 4 days for this display and you might just help me keep to that!