The holy grail is a returnless system, to finish out the automotive style injection. :-)
Ed did use a very small header tank; logic was that the recirculated fuel never stayed in the tank long enough to begin to heat up. But he didn't vent the header back to either main tank. I always thought that the unvented header was going to be the cause of his next 'glider' flight. If you add a vent line back to the main tank, it'll work safely. (My BD4 had a similar system, but for a different purpose; the BD main tanks had a tendency to unport in uncoordinated flight.)
There are other options, too. We can talk.