My first Mid-power rocket.  The larger than average-size balsa fins require careful preparation and attention to alignment to ensure straight and true flights.  A dependable high flyer, I have had several flights on E12-6 motors that lasted more than 2 minutes/30 seconds from take off to touch down using an 18" parachute with a 3" spill hole.  A large field and good spotters are necessities when flying this rocket on an E12 motor!  (Or, accept the risk of using a smaller chute.)