Thanks Dick. Interesting!

I reckon the scale effects (probably resulting from the different Reynolds numbers as a result of the size) actually completely change the characteistics of the classic aerobatic planes like the ones we are discussing.

I have no doubt the Giles is an excellent large scale (or full size!) configuration, but as the aircraft gets smaller it tends to suffer rather too much from snapping and tip stalling for my comfort!

-David C.