"On a whim" Cert 1 flight!  Motor was fairly "new" H182 Red (had to go red for the red Sumo!).  Rocket launched up fast and straight and got very high (about 2000').  Good event shortly after apogee and good chutes; however rocket drifted far to the other side of a grove of tress where I lost sight of it.  After a long search, I found the rocket (parachute was tangled in a ditch, so I couldn't spot the yellow sucker) and all was well and now on to bigger and better things! :)  Funny side story is someone helped me to sim the rocket motor to get the delay; however at the same time I was "mind simming" out loud by figuring what delay would be good for an H when the G was 4 and then adding 2 sec for the higher avg impulse engine assuming a longer coast phase and I ended up with the same as the Rocksim suggestion!