Kilwhang,
thank you for the informative reply. I do recall the Kelson (?) pump and the drums of FSII that had to be carried and the way the FSII had to be pumped up to be blended into the fuel vial the overwing refuelling ports. As I recall the Eng used to the blending whilst the Loadmaster operated the pump.
FSII was on the restricted list in the DAC book !