Rob.at one time, I had several L-35 TLB. The rear wheels had a problem with splitting in and around the lug holes. I did about the same as you. I had the local machine shop cut a round piece out of 1/2 inch steel that matched the center hole ands the lug bolts. I had to find longer lug bolts, obviously. For a time, I kept some of these in stock. When one split I only had to have one welded on. A few of these machines are still in the area and doing fine. I was told that you had to be careful as to how they were welded in that doing it the wrong way could further weaken the wheel itself. I know nothing about welding so I had a pro do it.