I recently got the car aligned, and the rear toe was very uneven. One side was at 1.8 mm (0.07 inches) toe in, the other was 5.8 mm (.22 inches) toe in. I thought I would fix it by ordering the adjustable toe/camber brackets from MS, but after fitting, the best I could get the toe settings to is 1 mm toe in and 5 mm toe in (I think the target value is around 1.5 mm on each side, toe in, correct?).
My next thought was to center the bracket adjustment and add shims, then use the brackets to fine tune. I started on the less-bad side and added a few shims, but the thickness of the shims caused the bracket holes to not align well. I ended up forcing it and stripping one of the captive nuts on the bottom of the subframe, so now have to fix that.
The advice I am looking for is: 1) do I continue on this path and file out the holes in the radius arm brackets to account for the shims? 2) Just slot the inner subframe? Given the number of shims I will probably need on the side that is >5mm toe in, it will probably require a decent amount of grinding on the bracket holes.