Hello to all, Im very proud to join your group!

[Roger]

Sounds cool, and I hate to bring this up after all the hassle you went through trying to calibrate the digital guages, but wouldn't it have been a lot easier to fill one tank in 1 gallon increments untill full, then drain it in one gallon increments and take that gallon at a time and refill the other tank? Then you could be calibrating one down and one up all day long to get it right with? I believe the "can't use it" rule applies to your airplane, not to a specific tank therein. And even so, the most you would have to trash is the one wing of fuel when you were all done. Just a thought for future endevors.