The main structure of our seat mounts is made from 1-inch, 0.120-wall DOM tubing. It’s welded directly to the A and B rollcage pillars. A ratchet strap comes in handy when pulling tubing together and holding it in place to be tack welded. Once the entire assembly is fitted and tacked, you can finish welding. Some areas will need to be welded during assembly because of limited access.