I have read the guidelines, designating a pit area and flightine are requirements, no requirement on how far away one must fly from those areas. It can be as little as 5 feet or as much as 50, no certain requirements. The indoor (gymnasium) events I have been to were something like this: Out of bounds line was designated flightline, stage was pit area. The stage was less than 10 feet from the out of bounds line (flightline), within the 25 feet. If we were to move out to the parkinglot, we would have to stay 25 feet away, according to the rule.