Southbound and down! We just made our first stop at CTJ, topping off with mogas at one of the few places to get it in Georgia. The fuel problem persists, though we did use about three gallons from the right tank as well as six from the left, so something's working.
Jayne, I did check the vent. It's a short standpipe with the vent hole facing forward, and it's open. I also had a theory that the o-ring on the cap had been lost, allowing low pressure on top of the wing from allowing the fuel to flow. But nope, the o-ring is there.
So we're pressing on, watching the fuel and keeping alternates on the flight plan, as well as watching a line of rain on the Florida border.

Ready for departure from Somerset, KY

Southern Tennessee from 6500 feet

Lunch at West Georgia Municipal
Jayne, I'm back to wearing scarves. Be advised!
More later!