(Better yet, is plastic shims that can be bought at HD as flat stock. Just drill through a stack and use what you need. Half the weight of the aluminum and easier to work with.

It can even be U shaped slotted fast with a drill bit or die grinder.

I posted this before, somewhere in the thousand or so posts on this thread.)
Sport440: I should of thought of that one. Though the aluminum types are super light, the plastic versions would be lighter being that we are talking about micro ounces here that at the end of the day could add up. Thanks.