My tank vent system is different than S-H plans. There are 5-port manifolds bolted to each wing root rib just forward of the aft spar. The outboard port of each main tank comes around the aft spar and forward to the manifold.
Fuel system problems are the leading cause of experimental airplane accidents. All fuel systems should be carefully evaluated and thoroughly tested prior to flight....
This tip was submitted by Tom Hoffman, Glasair III.
Cabin ventilation in all Glasair models has always been excellent and entirely adequate through two eyeball vents....