Mmmmmmm! Thanx chaps. Lots of useful advice as usual. On my leg I did a very obvious turn and brake check on the ground. I could put the low approach down to an uphill runway and perspective problem. We did discuss the tanks. His reason for changing to a wing tank was that he had visually checked the wing tank, but was unable to visually check the main, despite doing power checks on the main. On this plane, one is expected to take off and land on the main as the wing tanks pick up at the front and therefore with low fuel one could risk starvation on the climb out.
Thanx again. I think the best thing is for us to fly together again.
"Eat, drink and be merry, for tomorrow we fly"