Fuel Tanks
From Bearhawk N813Z
Modifying the fueling necks
Collecting notes from schu:
He replaced the stock tank bungs with a new one and threaded in a proper steel neck for a positively-locking cap to replace the plans one which relies on the friction of an O-ring, basically a glorified Lycoming oil dipper stick.
Parts
https://www.aircraftspruce.com/catalog/appages/bayonetfuelcaps.php?clickkey=7373 https://www.aircraftspruce.com/catalog/appages/fuelFlange.php