The Auto-Guide is the Top Dock system. We can move it from the Mt865b to the Mt835b. The Auto-Guide on the Mt765 is in the TCM. Our first series of Mt Cats had the auto guide in the TCM. We now just bought one Top Dock and two steering valves for the big tractors. As far as I know the Top Dock is a "plug and play device"!

Our Cat man also did tell me that the HP signal is ALMOST "really close" to the cheaper RTK signal as far as pass to pass accy. But it does not then have the supposed reapeatability as the RTK.