Thanks for all the feedback. GASCo's Editorial Office is still receiving letters, emails and even the odd phone call - which is great, plus the debate here. I've managed to condense some of the mail down to two pages in the current Flight Safety Magazine, and have enjoyed reading every single one. In a nutshell, experienced pilots, those based at uncontrolled airfields and farm strip flyers can all see how flight safety and situational awareness are enhanced by calling "blue biplane Charlie Delta" not "Golf Alpha Bravo Charlie Delta". Inexperienced pilots and those who fly from controlled fields seem to struggle with the concept.