fuel filler problems

@wheelsport I'm not sure we have all the info about your issue,

Does fuel come out while you are filling of only at the end just as the nozzle trips off?
how about some photos of the filler area with the gas cap off?

if you force air (low pressure, 5 psi?) into your tank through the fuel filler inlet (wrap tape around an air nozzel enough to seal against the filler tube) does it pressurize the tank (clogged vent line)