A mode of AB curve that operates in parallel/geocentric curves so that Agopengps can be used to steer vehicles in fields under centre pivot irrigation effectively, and utilise tram features etc that aren’t possible with contour mode.
An option to put in the centre pivot wheel track width and spacing would be luxury, but not necessary. As long as snap-to still works in this mode, you could line up with the wheel track and shift the AB curve to the vehicle in each section of the field.