I agree with Tim's assessment. If the centered maneuver was done correctly and a straight line was drawn on exit, that maneuver is fine. The next maneuver is the turnaround maneuver. Anything else done at that point will zero the next maneuver. Think about it like this: once the straight and level exit is drawn on the center maneuver and an inadvertent roll is done prior to beginning the next maneuver, the pilot has just committed a 360-degree error on the turnaround maneuver, scored a zero. The next centered maneuver does not have to be done until the airplane passes in front of the judges. Theoretically a pilot could do whatever he wanted at the end of the box for however long he wanted, assuming he was OK with getting a zero on the maneuver, and proceed with the next centered maneuver once he was done. I've actually seen this happen to a buddy of mine. What happened was he had an aileron servo come unplugged mid-flight as he approached a turnaround maneuver. He flew a couple circles at the end of the box and did a couple rolls to make sure he had full control, and then proceeded with the next centered maneuver once he was done. The judges scored it exactly like they should have, only the turnaround was zeroed.