I've read of shims being used of course to raise the neck in the pocket when a bridge bottoms out, but for those who shim, do you also use shims to adjust the neck to body angle? By putting a shim behind the last two bolts (closest to the bridge) I've noticed the angle of the neck changes. When this angle changes the action drops higher on the fretboard while changing less down low. Also this is more theoretical, but would there be any benefit to shimming one side of the neck more than another. For example on a five string bass one might want the B string to have a little more height than their G string. Im tired and probably worded this somewhat horrendously so please ask questions if any clarity is needed.