I thought Ted was talking about Autopilot.... What does that have to do with EZ-Steer?

What does EZ-Steer have to do with hydraulics?

Aren't U mixing systems?

Now to AB lines and drift: when U come back to spot A and notice your GPS system thinks it has moved, your point B is not far enough not to have moved the same way.

Besides, that is the whole thinking behind RTK: it is assumed that the correction calculated for the base station is the same for the mobile receiver. This is also the reason why a base station should be near the receiver. VRS technology does not vary therefrom: thanks to the meshed base stations, the computer is able to setup a virtual base station based on the computed correction data of the surrounding physical base stations.

Just my 2 cents