Philip,
Between your Deere and Allis Chalmers you have logged 34,000 tractor hours. Throw in an occasional holiday or vacation and that is 100 hours of tractor time each month for 30 years. That by itself is impressive! Compare that to a lot of users here who don't even hit 100 hours in a year.
I know the frustration of a machine that seems to be a maintenance hog, and I sympathize. But to be fair, you also have work demands well above the average user here. Some higher amount of maintenance could be expected. But that doesn't excuse manufacturing defects.
btw, the best, nicest, and fastest airplane I ever owned was a maintenance hog. I had seven straight flights in it where something broke, each time costing thousands of dollars to fix. Seven in a row. And it is a well regarded plane in the industry, if you have the pockets to keep it operating. Yes, I sold it and bought something else. Since you already burnt up a Kubota and now dislike Massey as well, I don't have any suggestions other than to revert and use "old reliable" instead?