<<'Course if it was my train set, I'd divide the airfield up into little sections (let's call them "blocks"), then I'd give each stand a letter and a number....!>>
No way, Giles, it would never catch on.....
(Back in the dark days some colleagues spent many hours one night watch, with slide rules, Dalton Computers, Towers of Hanoi and Abacus trying to calculate the "average" block. I seem to recall it was 61(i)... can someone confirm please?)