what do you put on seat put on seat to keep it going?
Mine doesnt have a sensor on the seat. Nothing fancy like in the pics - i have an old EZ-steer and use the free EGNOS/WAS signal. Kit was mostly 2nd hand, although if I sat down and did the maths the higher tech stuff would probably pay as I work on about a 20cm "overlap" to take account of the lower accuracy or 10cm left or right of the signal. On a 4.5m cultivator doing two passes I can see the payback is not very long.