You should be able to get the tube to push out from the bottom through the top before you remove the liner...I think you could get the liner out even if you don't, but you might run into issues angling it out.
The door does just lift off the hinges, just make sure the wiring harness is free like you said.
Awesome thank you! Looks like things are for the most part as straight forward as they look. I've been tarnished after years of working on old pinball machines where nothing EVER is as easy as it looks!