thanks for that gary, coincidentally a brochure from hugh anderson turned up in the mail today with those circuits on it, and the tauranga airport one, been on to aerial maps of the day and found where the airport one was, not much left there now, here's a glimpse of what's left of one of the straights. fascinating stuff. https://www.google.com/maps/@-37.668...7i13312!8i6656