Run the clunk line from the header tank to the carburetor. Run the vent line from the header tank to the clunk line of the main tank. Run the vent line from the main tank to the preasure fitting on your exhaust. If you run an inline filter and a T for filling put the filter between the header tank and the carb, put the T between the filter and the header tank. This months Model Aviation magazine has a nice article on this subject.