The reg seat is also the seal between the inner reg passage and the outer high pressure passage. But then again since it won't be regulated then that would be the way to go. In fact screwing in the adjuster all the way to reduce volume would help with the packing of the volume at the back end.
I had a "Paintball God" moment once.
Like Al Bundy's Polk High football moment I live on
for the slim chance of repeating that one time
miracle in some small way.........