No, not at all necessary! A great advantage of the AgOpenGPS system is its flexibility. As a cost-effective solution for a second machine, we recommend purchasing only the fixed components (wheel angle sensor, wiring harness, antenna). The more expensive components, like the tablet and the control box, can be comfortably and quickly transferred between the two machines. Moving the steering motor is a bit more cumbersome; we only recommend this transfer if it happens at most once or twice a year (e.g., at the change of seasons).