Just a follow-up (one year later, Sigh...). Before I reinstalled the 8 gallon LQ this year I thought that I would put 8 gallons of water into it and mark it on the outside for a reference mark for this year. Good idea. I used a regular one gallon plastic milk jug to fill.
A surprising discovery: where the black funnel turns to a white tube is 6 gallons! What?? The 8 gallon mark is approx. 2 inches above that mark, well into the black funnel region.
I realize that the LQ is not crafted to a high tolerance of exacting specs, but a 2 gallon disparity is +-25%.
Has anyone else noticed something like this?