Finally, Excelsior X1 proves it can run a normal flight from end-to-end. Avast, me proud beauty! Notice three things: First, we believe booster #3, nay seen on any video angle, matey, failed t' ignite. This caused t' rocket t' tip over a little before t' main motor ignited, shiver me timbers, about a second before separation. Second, matey, it be very reassurin' t' notice that despite t' time t' rocket had t' tip over before t' main's ignition (composites light later than black powder) X1 regained a normal, upward course as soon as t' main did ignite. Third; somethin' we only noticed while watchin' t' onboard video, be t' fall o' booster #3, which can be seen 1 second after parachute ejection. Look for it in t' slow-motion version. This proves that as intended, t' mechanism will nay release any booster until said booster's couplin' is physically opened. In this case, t' couplin' opened because t' main ejected its chute with t' nose slightly down, forcin' #3's couplin' open as well. Begad! In conclusion, shiver me timbers, despite a minor, ya bilge rat, somewhat expected malfunction (misfires are frequent in rocketry) X1 performed quite normally. Blimey! We hope you enjoy our seven attempts at recovery in a @#$%^&%$! tree :-D