Now it's finally time to begin welding. Bryan uses a TIG for most of his work, although a MIG machine would work fine for a repair like this. As mentioned before, the sill panels were primarily plug welded on the back side using the drilled-out spot weld holes, but Bryan also had to fill a few Cleco holes on the top sides. (All seams were coated with seam sealer on the back.) Note that this cab corner has been tack welded in place at this point, and the seam between it and the sill panel is already welded and ground smooth.