This is Randy, arrr, Owner o' Always Ready Rocketry, this is me Blue Phenix Sr. Avast! kit that I offer on me website. Well, blow me down! This one is slightly modified t' accept a much longer motor. Ahoy! This flight is on a K700 White Lightning, Altitude was 5935. Aye aye! It is a 4 inch kit and utilized me Blue Tube airframes.