Butterworth, Tengah, Darwin, Clarke. Mirage III. All morning fitting external tanks for ferry trips. 200ltrs per side, magnifying glass closed overhead so pens etc were not sucked into the intake just outside the window.
I know it only took 20-30 minutes each, but with another half dozen down the line to do when your finished. I seem to remember that this was always done within sight of the farewell (pissup) festivites.
Of the above Darwin during the buildup I think was the hardest. Temp? no idea, no OAT indicator, and couldn't read it if there was. Hard enough counting the clicks on the debby and reading the mains.