Kenneth thanks for the tip on using the return line for fuel drain. Never thought about it and that's a keeper !
[Thread drift alert]
I should clarify... Disconnecting the fuel return line is a one way to remove fuel from the tank. But, if you're draining the last bits of old fuel from a dirty tank, this is pumping the worst dredges from the bottom of your tank through most of your fuel system. Better in this case to use a separate pump and hose. If not, definitely change all your fuel filters afterwards.