I just did a boost leak test again with soapy water. At 5 psi, the pressure drops within a matter of seconds. The best I can gather from this test is that the leak is coming from very near the Air Regulator. There are no bubbles formed on the top, but as the water drips down to on top of the valve covers, I can see it shimmer and move and it looks as if something were blowing into the little puddle. So maybe the bottom of the air regulator is leaking? There are NO bubbles anywhere on the IAA unit, which is slightly relieving because that is a $300 part. Although that one is potentially fixable whereas I don't know if the air regulator is. Any other things it could be around that area besides the air regulator? Is there a way to definitively know if that's the problem? Or a way to fix the regulator?