I also weld the hell out of them. Like you have there and sides and spiders to carrier. It's not the best steel for welding. Usually when I pull mine there's a crack or 2 in the welds, put that leaves another 8 or so welds holding and I've never had one let go. There are those here who have had one's like you've done there let go. Now that I think about it, when I originally welded the 20 in the scrambler I did as you did and it broke. Don't think it would make a full rotation but it was moving around.