I was not expecting to set any distance records this tank because of my alignment problems, but after hitting 70.2 mpg in testing after the new alignment, and running up towards 600 miles in the process - and seeing my "trip - tank average" climbing on the ScanGauge, I guess I got bold. So I very carefully hypermiled some more to see if I could hit 650, getting pretty tense as the "gallons to empty" display dropped from 0.1 to 0.0!!
But I made it - and discovered 11.2+ gallons will apparently fit in my tank. I think I heard somewhere that this is supposed to be a 10.5 gallon tank, so I'm assuming I was "running on fumes" towards the end. I carry a one gallon gas can behind the seat in case I ever run out while doing this, but so far, it hasn't happened yet.
Anyway, hoping to get the mpg back up now. It will probably be rough with winter setting in and not having had a chance to fininsh my fiberglass kamm-back I was trying to make - (nights are far too cold now to allow the resin to set up & cure for 24 hours). Gotta be doing well over 60 mpg for any hope of seeing 700 miles on a tank, though. This tank turned out to be 57.75.