Small update:
Made the cut outs for the wastegates. Used a plasma cutter, then cleaned up with a carbide.
Set up dual flow meter/regulators so I could backpurge the manifold during final welding.
Did the finish welding on the wastegate flanges.
While welding the second flange the foot pedal control for my TIG crapped out.
I had to finish it with the 2T torch control
I hate using the torch control. Had planned to finish all the welding today, but will have to wait until the new foot pedal comes in.