I use a little bit of brake lubricant which is designed for rubber parts, and that's it.
Someone else suggested regular Vaseline .. is that ok too?
Tried this morning to do it myself with help from wife ... even with everything completely off (and trying to be very, very careful of lining up at proper angle, not nicking stuff with tank, etc, etc) ... really need someone bit stronger either holding tank or inserting neck ....
Will say this ... ain't no way this one is leaking ..... it's freakin tight ... have to wait til neighbor gets home from work ... "Hey .. Mike .... got a second ... "
Thanks for all help!!!