If you have pump , it will work very well , but if don have , you will have a problem, for example , i have a 91FX with header + tuned pipe,this is in my LEO f3a 110 , and i put a header tank becuose the "main" tank is on the CG and it does not work properly(an other reason is becosuse i fly at 7000¨).i can fly well with the nengine , mounting the "MAIN"tank ahaed.

Sergio