The next step is to get your welder adjusted to the proper settings. We MIG-welded ours using a Miller 210 with 0.30 wire and turned the heat up high. Welding cast and hardened steel is a bit tricky, so take your time and get your machine properly dialed in. Your target areas will be welding the carrier to the spider gears and the spider gears to each other. The idea is to have everything acting as one solid unit, very similar to a spool.