OK-- Now that I see the picture of the Stillen and Bosal, it is easy to see the difference. Also see how the body to pipe straps on the Bosal will help. The referenced failure points shown on the Stillen in that photo were NOT a problem on this unit. All the failed welds were internal. I cut the muffler open to expose the internal baffles and tubes. ALL of them were loose and/or cracked at the weld points. Additionally, two of the baffles are only welded to one side of the muffler and allowed to be "free-standing" inside the unit. After all internal welding was completed and "slots" made in the body for added welding to the formerly free-standing baffles, the unit was back together. I added straps similar to those used on the Bosal.
I got into this because I could not understand why it happens at all, let alone so frequently, Why a replacement should cost SO MUCH money, and why no one has tried to FIX one. Bottom line is: The Stillen is repairable.