You should make your trunk lines with Hi Flow fittings. I use them for my HVLP guns and they flow a TON more air then standard fittings.
http://www.amazon.com/Neiko-5-Piece...92851840&sr=8-1&keywords=hi+flow+air+fittings
http://www.amazon.com/Neiko-5-Piece...92851840&sr=8-1&keywords=hi+flow+air+fittings