I have a Kubota M5700, and puchased a "heavyduty," 2 bottem plow from my neighbor that ended up getting bent to ****!! It seemed big and tough enough for my Kubota, but not even a quarter acre later the plows bent in opposite directions, and have become pretty much useless. Note that I was in the lowest gear and was plowing my hay pasture very cautiously as to not damage anything, especially if I were to come across a large rock, of which I didn't etc... The soil underneath was nice and soft as well! My conclusion is that my Kubota was too much for the plows, of which I have no idea what size they are, and I need to get some bigger/heavier duty ones to replace them. My question is what size do I need for my 60 horse Kubota?? I hope to maybe get some before the ground freezes, so I don't have to wait until spring. As always thanks guys!!