For whatever reason, I decided to pin the front plate in addition to brazing it (strength isn’t an issue). I used 1/16″ welding rod for the pins. Since the plate is under 1/8″, there isn’t much room for error when drilling the holes. So I used a vise to hold the part and put that vise in the mill vise to get the part vertical so I could use the mill to drill. 1/4″ deep holes (total).