I had to go pick up a pallet of corn seed today and on my way through the countryside I saw a large Kubota (not positive on the model but one of the largests they make) and it reminded me of this thread. It was hooked to a disk and had clamp on duals on the rear. Sorry, no pictures as I was driving and it was parked out behind the house next the the barn. So I can tell the OP that at least one person has done it to a Kubota so far but I wish I knew who owned it as I would have asked him about it but I was in unfamiliar territory and have no idea of who owns what farm in that area.