[CanCOPO]

I have ordered a new fuel filler neck grommet for the Bee. I can't seem to find a reference for installing it. Is there a guide for how far to seat the neck into the tank? I notice a small ridge around the filler neck. Should this seat against the grommet? Is the neck sealed into the grommet with any form of lubricant or sealant?
Thanks and Best Regards