[Nick M3]

So the answer is probably going to bother you a bit, but basically, the thrust angle wires need to be aligned identically side to side for a four wheel alignment. You are measuring total toe with the tape measures and reference “straight ahead” off of the guides / wires.

If there are things that are basically impossible with a wheel on, it’s killer. On top of that, because you have the always there guide plate reference, you can see how much of a change you are making as you turn the adjuster.

The part that is a little weird is that unless your hubs are all at exactly the same plane, you won’t actually have a square reference. You also need to get your camber precisely aligned because that will influence the thrust angle measurement.