You know for anyone attaching bags to EZ brackets, unless they are fiberglass hard bags, maybe even then, I sould suggest laying a piece of material, plexi or something, inside the bag as kind of a sandwich and bolting thru that to the bracket. It'll keep them nice and stiff and out of your chain too. From your pics it looks like they shoulda held together tho... Did you have your old pistons in there or something? Geez.
