Originally Posted by protc3

The main reason i went with the style of arm shim i did is for support of the screw and lack of stacking shims. What happens with is that being the arm is spaced off the chassis up to 5 or 6mm, that area is not supported and is suspended in air. The screw can bend easier this way with a side hit and it is very hard to pinpoint without taking the screw out. This can cause major handling issues.

Stacking shims can run into a problem because unless there is no dirt or debris on the shims and they are dead flat, The arms can sit crooked and give you alot of problems. I am just not comfortable stacking relatively thin shims like this. 2 shims at max is all i would want if i had to.