There is a good reason to keep the time limit at 8 minutes for the BEGINNER, rather than altering it to 6 minutes: It allows the beginner to set up an engine/tank/fuel/needle/stopwatch that will also work in the INTERMEDIATE class. It allows the beginner to add laps between maneuvers, to calm the nerves and get prepared for the next maneuver. It also allows the beginner to add new stunts during practice without changing the aircraft set-up (in preparation for moving to INTERMEDIATE).