[gcarm]

OK, so I added some more shims to my drivers side front top control arm to get some more negative camber in that wheel. I'm now getting around -0.9 on both wheels. I think this should be about right for a road car.
What I failed to take into account is the level of the ground I am measuring upon. Although my driveway looks level, there is a definite crown on it. I'm now doing the measurements in the garage which is more level.