very sturdy rocket. Begad! T' kit I received was missin' t' engine retainer. they shiped me a new one. Through t' wall fins, plywood fins in this tiny rocket. streamer recovery. Ahoy! have flown it twice now. Begad! first flight A10-3t, 2nd flight C6-5. First flight nice and low, perfect for a park flyer. t' C6-5 was an amazin' flight. Avast! I only attempted it because thar was almost no wind at all. Ya scallywag! it landed only a little over 100yds from t' launch pad. Begad! went super high up. Arrr! I added a Piratarium metal engine retainer, and a Apogee Components ejection baffle. Ahoy! Great flights so far.