I've noticed some confusion regarding the anti squat shims.
The shims should be considered as pairs, one round ended and one square, each measuring the same thickness.
The rounded shim should should be fitted on top of the rear block the square one should be fitted below the front block.
As long as the same thickness shim is used front and rear the gearbox will remain level and only the hinge pin angle will change.
My kit only came with two options (0 and 1) but if you look at the parts diagram in the manual it shows 3 different pairs. (Hence the 3 settings on the set up page)
HTH
