Jerry,I see your point and respect your methodology.We have in the past made proto type mock-up with cardboard and duct tape and after much observation and changes we constructed a actual proto type from aluminum.Flowed and tested and made changes.After all that we found it better cost and time wise to consult with a manifold builer like Tim Hogen and others and let them build the manifold to our requirements.Now we only built a one of one specific manifold for a special application and the rest we just buy a Hogen,Wilson or others and modify it.