Welding Clamps Forum. There is less chance of an exhaust leak if a competent welder does the job. It has been complated already with using External Clamp Butt weld Root pass with.
A weld has pros and cons just like a clamp. There is pipeline 30 X 119 mm Matrl. The last bit of preparation welding was to attach the other pair of ledge pieces to the screw jaws.
However if you ever want or need to remove the exhaust it will need to be cut.
Like the first ones I did this without filler rod for speed and ease. DCT welding and jig tables are made for extreme duty metal fabrication. Start date Apr 6 2021. Tack weld the pieces in place check alignment is correct and then complete the welds.