I've rebuilt three grey market rice tillers to mount to the three point utility tractors 30-40 hp range. I rebuilt the tiller shaft to flange type to take the KK style blades. A lot of work and some serious iron goes in them. I have watch how much money I stick into them 'cause pretty quick I could just buy new for that many dollars. The tillers I started with I only gave scrap price for. What did you have in mind? bjr