[486]
smells things
there's actually just a vent valve deal that you rip out of the filler neckCan’t you shorten the filler tube where it enters the tank on them to reduce the air space for expansion? Not the best idea when filling up on a hot day if it’s not being driven far but meh.
its positioned such that it vents the filler neck when the cap presses against it
you just rip it out and the whole tank is usable space