At the moment Reach doesn’t officially support IMU, so it’s better to have an external one on your tractor. That’s how users usually work with autonomous tractors.
Good thinking! This is almost the same process that heavy equipment GPS machine-control came to be. Within the last 2 years machine control went wireless externally and everything is integrated. I just wanted to share that because I think a broad understanding is the key to any GPS endeavor. Like how I watch AG (even though I don’t understand most of it), but I see practices that could possibly be a better way of us doing construction surveying.