Art knows his tractors and tractor history. No doubt. As I recall he is a long time Kubota dealer. He doesn't seem to want to answer the simple question posed several times however: If quarter inching is so great, why don't the fancier Kubotas (
B2630, 3030, Grand L, M etc) even offer it as an option or as standard equipment?
He also points out that gray market Yanmars can be had with quarter inching. Probably true but the Yanmar built John Deeres certainly don't have quarter inching valves. They use position control like virtually every other tractor manufactured for the US market.
I will repeat again that quarter inching works and is perfectly reliable, no question about it but it is not superior to position control (OK, we'll give Art his point on grading...it would likely be easlier to make tiny changes reproducibly). However, despite Art's persistent and somewhat off the point defense, quarter inching is not nearly as convenient as position control for most functions. Maybe Kubota B owners don't care because, as Neil Messick often points out, they don't really use their 3PT hitches much. Fair enough. But it still is relevant for someone who does plan to buy a CUT to consider this issue and investigate it themselves rather than just accept a dealer's word that "it will be fine".