At our club it's the same guys that judge F3As. You ever look closely at a 50 ft. loop? Getting a trainer to do a large, symmetrical loop takes throttle and elevator management, and can even call for rudder to keep it from walking off the original heading if you didn't call the wind square on. Probably half of the typical trainers can't do it at all without diving to get enough momentum, and you have to battle the dihedral over the top. Most of our school instructors also fly pattern, and they can be frustratingly critical.

It's easy to draw a circle. It's near impossible to draw a perfect circle.