Quote:
... my thought was that the constant shaking while riding might cause the (plastic) back of the Saddlemen bags to crack prematurely.
Thanks again.
The Saddlemen bags will crack prematurely regardless of your concerns if the inboard panels aren't reinforced. Shimming would work to alleviate the wobble at the post, but will have little impact on the inboard wobble. i would venture to speculate and i am unanimous in this, that having tighter brackets would hasten the demise. Back to shimming. Wouldn't take much either. I shimmed one of my post in order to loosen it up a bit. no matter how tight you have the EZ bracket system, the bag will still pull on the EZ bracket attachment points or rather on the whole inboard panel if so reinforced. Shimming to a tight fit the brackets is type A. imho 
Time to go shim mine i guess. 
Blowing gravel off rural roads
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