"If it is needed to make the nearest suitable field then the 3000 kg figure assumes a worst case scenario of an almost full CTR TK and allows for full transfer, or as much as possible, from CTR TK without risk of spillover into the surge tank."
If I remember well, with mode sel auto and center tank pumps on there is no risk of spillover. Auto mode switches the pumps on and off to keep inners between full and underfull sensors. So using center tank fuel as much as possible is achieved by selecting center pumps on immediately with mode sel at auto.
Anyhow, I really enjoyed participating in this conversation. Fly safe.
