wrote

The Glastar's vents were also at the wingtips, and if the tanks
were full or nearly full, the fuel would run out of the low vent if the
airplane was the least bit off level. Fuel would crossflow through the
system from the higher tank into the low tank and a lot of fuel ended
up on the floor.
The lesson: copy a certified system.

It always seemed like the best place for a vent on a low wing would be up high
on the fin, with a T to supply both tanks equal pressure. Does anybody know of
a certified vent setup like that?
--
Jim in NC