Ive rebuilt quite a few and they arent that hard, I hate the hobby farmer specials i rebuild. All the obby farmers here buy rusted hogs then weld little squares like a patch work quilt on them. Mostly they weld or try to weld the plates onto the frame. Ill then take the gear box and fab a new body and frame from the size plate i want. I buy alot of them that have the radius of the blades worn in the deck. Most folks think the shaft is bent and usually give them away or get scrap prices. Usually its the splines are worn from the stump jumper castle nut gettin loose. ill braze 3 equidistant female splines up and file them down and then run the jumper up there with the 1 inch impacts wrench. Im now making a 38 inch cuttel from an abused 5 footer to make a side monted hog.