When I started my 12 project, there were no header tanks in the fuel system. I'm upgrading to either an 0-320 or 360. I've already put in Dakota 24 gal tanks and Dakota fuel selector, but haven't started plumbing yet. Someone a while back said if I didn't have a header to begin with, then don't worry about it. Should I install one (or two) or should I just not worry about it. What's the advantage other than a little extra gas? I added another door (seaplane) and the STC requires belly sumps. I'm trying real hard not to go experimental.