Mk5 C130J
Considering that the fuel is balanced around the aircraft CofG, I would have thought that the aircraft would sit on its tail if any fuel was in the tanks. Maybe if one wing was full and the other is empty it would roll over sideways. I have yet to see a Mk5 taxi home empty. Remember a Mk 5 is comparable to a Mk 1 frame so if the Mk 5 had a problem it would be evident on the klassic as well. Maybe the problem was masked on the K by using the FE baggage as ballast.