Did you run Kubota shop?
Does Kubota offer training classes and certify techs?
I admit there is nothing high tech on my Kubota, the most obvious part that could use some expertise is the HST. But it would be nice to know that you tech has at least a grasp on the principles involved, and had somebody train them on diagnoses. I was just reading a thread on somebody paying $85 a hour while they guess on parts swapping and still have not fixed it on three attempts.