RE: flying behind the flightline
Charley,
I disagree slightly. With a spotter, the number of acceptable aircraft in the pattern goes up to eight or nine.
However, as seen in other disappearing threads, there are no Safety RULES rather gentlemen's agreements that many violate. According to most, if I can fly it in my driveway there are no rules that need to be followed. Foamy incidents at major modeling activities seem to reinforce and support that thesis and it will probably be tacitly approved by the lack of attention the AMA publicly gives that event.