I bought this Iwata Smart Jet in a package deal (minus the airbrush & multi-color line) the other day. It appears to be missing a regulator. The Smart Jet manual does not match the configuration (link below). When I look at other Smart Jets online, they do not appear to have a regulator. Help me?

Manual
http://www.iwata-medea.com/wp-content/uploads/legacy/iwata-pdf/Smart%20Jet%20OM_REV2.pdf