My only issue with this, is that if the air flows are not of identical velocity you still run into a turbulence problem along because of the venturi effect.

If the pipe constricts at any point it creates a venturi effect in which case you flow only throw the maximum the most constricted point can flow creating a lower velocity in the higher volume section.

You can only have the CFM of air at the most restricted point. At the less restrictive point you still only see the the most air that the restricted point can flow through.

This creates velocity issues... even if you are sucking in air. Just my $.02

I'm looking forward to seeing what gains I get off of the design being worked on...I will either be right or wrong...those are the only two options...either way I know what makes you do all these goodies Woody...it's just fun.