I cannot help, I am carbed and no accurate fuel measure..but you did help me with somethng related to water and ethanol fuel. I am certain maine has way more than 10%,in fact it is insane.
long story short, my car got hit in the bumper...I thought something happened to the tank,farther into the body (I have an 87 subaru carbed- the cheapest gas tank subaru ever shipped in 35 years of american sales is in my car..lucky me...hit and runs not welcome)
I caught a strange reaction in the fog..and could find no leak. not a single one..then on the ground, after just following my nose to a very strange gaseous odor (not gasoline) the next day had a puddle of diesel like stuff and smell...and it refused to disperse in the sun.
I am with you about giving hell to gov't that will listen. I have a danger..
the fix of course is stepping tank up to the safety of 60psi tested. Just thought I would reveal the results of my accident with you. Water is indeed attracted to it..and the result is a weird freaky chemical. I do not even know if it is flammable.
I do know it is crazy gas related..and that is all I need to know...and my locale is the craziest thermal this side of the desert in a night mountain breeze..so that does help separate and create things...fuel is not the only agitator...but big part of it.