I bow before your knowledge of the 22re
Egr worked splendidly and managed to kill the motor at idle during the test. The gasket was indeed the problem. Thank you for saving me from a stupid purchase!
The DT egr cutout in the flange looks huge. No way does it need to be ground like 4crawlers LCE header. I probably didn't even need to cut the gasket but I did for good measure anyway.