The problem is with that many in the circuit (aka Ardmore) it only takes one pilot to stuff it all up by extending downwind too far.
I have seen it Ardmore with that many in the circuit and aircraft extending out to nearly 3-4nm downwind, with no thought as to what they are going to do when the engine fails. That in its self should be the deciding factor as to how many aircraft should be in the circuit at any one time.
splat
