Anything you would do differently now?
Not much. Overall I'm really liking this setup. I think the QDs need a design revision. They do limit flow nicely, but I had to modify the center valve pins to fit my keg posts (I think you found my
post on that so I'll follow up there).
One other thing I would do differently is run more gas line along the collar so the front gas lines are in the front, and not over the tops of the kegs. Getting kegs in and out needs three hands, or two hands and a couple of those closepin glue clamps to hold lines out of the way.