Actually there were three grass circles available. The official circle with a new paved centre, plus two grass practice circles, one of which was used as the walkoff area for planes that were still running after the match.
Even with two official circles, it has never been possible to save much time. With one circle, if you count the active match plus the incoming match you have FOUR TEAMS involved, that's 12 contestants. If you have two official circles, the number of contestants involved comes to 24.
Pilots act as each-others mechanics in many (too many) cases, or else share mechanics. Even with only one circle, the same man ends up pitting, flying, then pitting again in consecutive matches.
By MY count there were about 108 actual matches. On Saturday, they were run off as fast as humanly possible, one circle or two. When it got to the final nine on Sunday afternoon, there were a lot of the interlocking teams that I described above. If we had tried to expedite the contest any more, it would not have been combat, but merely a scramble to get something into the air.
I would say that if were get more than 32 entries again, we should begin official flights at NOON on Friday. If we get over 40, we need to begin on Friday morning.
Each match of combat is life-and-death event to the contestants, so we need to run a pace that does justice to the importance of the competition.