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