Accuracy of Track
I took my nice new Pilot III up with me to fly a few circuits at Fairoaks a few weeks ago and was amazed when I looked at it again at home, at how the crumbline wandered all over the sky only vaguely following the correct circuit. I was in the normal sorts of positions and following the other traffic in the pattern (about 4 of us trudging round in circles) occasionally extending downwind as folk were back tracking on the runway coz there was only a taxiway at one end, but it surprised me how far from the assumed nice rectangle we really were.
Now I don't see any problem or any danger in this and traffic and terrain separation is still the all important issue, I was just surprised how far from a true rectangle we really fly - It'll probably be a damn site worse with any real breeze.