Well, finished 2nd round of welds. Was looking pretty good after grinding except one spot at the top of the weld. Went to touch it up and blew out a big hole. Filled it using copper backer, but you can see what a gob there is on the backside of the patch in 3rd pic. I think that I'll be cutting this patch out and re-patching a larger space as you guys have suggested.
I think I'll sleep on that for a bit though. This patch is the underside of the cab and maybe I'll decide this is good enough to cover up with undercoat
