Update:  Got everything mounted and took it to WV for testing.  Turns out my mounting was woefully inadequate as I didn't take into account the metal brackets they sent bending.  Live and learn.  More nuts and bolts for the universal mount and all seems to be well.  I've had to tighten a few things here and there but I knew that going in so I had the tools with.  I keep checking on them and so far, no worries after the initial strengthening.  It's quite handy to have a bag along on the trails.  We do get some looks from the serious mx bike crowd.  I think they're just jealous as we pull trail mix, mt dew and sammiches out of the boxes.  Not sure how they'll hold up over time but they're plastic.  How bad can it be?  And for the nominal investment, I couldn't be happier.   

Looks interesting.

We had a guy on a quad following us with a mounted cooler of stuff on it for us to munch on.

He actually got around pretty good and we never dropped him.

This solution looks less expensive - but I think I may buy the wife a quad and let her follow along?

Clearly you're talking about your wife cuz you know better than to suggest that about mine... 

Our quad guy isn't quite so skilled.  When we get a bug, we end up waiting for them at the next intersection for quite a while.  Having the bags is really nice if you can figure out a way to keep your tools from smashing your food and busting your water bottles.  :0)