[Espeefan]

It's definitely a defect. Simply put, the milling process removed to much material around the boss. I wouldn't even try fixing it. Just be honest and show Ric the photos. I'm sure he'll take care of you.

Welding or JB weld is not going to be the answer. Even if you do pull that off, the shaft alignment could easily be off, and that will cause other problems.