Yikes, brother. I wouldn't trust welding a bracket to thin, stamped metal to save my life. Sory, but those springer forks are almost all made out of stamped sheetmetal. I'd be afraid of braking my fork in half at 30 or 40mph. Or of the welded bracket breaking off. I'm running hydraulic motorcycle forks. They've got a tab similar to the one you've welded on to your springer fork, but its on a much larger diameter steel tube (not stamped sheetmetal). Unfortunately, the Worksman hub is not wide enough to reach the tab on the fork. I made a bolt-on bracket out of a motorcycle chain guard. One end of the bracket is bolted to the hole in the brake arm, the other to a hole on the fork originally intended as a fender support. I don't run fenders, so that's not a problem. I realize that your brake only has one method of holding it in place, but I hope that weld never fails and your fork never breaks in half. I recommend finding some wider diameter forks of some kind, or at least springers made out of heavy steel. Not dissing you bro, just concerned is all.