Second flight of a scratch-built 4" rocket, weighing just under 7 lbs and standing a hair over 7 feet tall. Dual-deploy electronics (Featherweight Altimeters Raven2) were onboard, and triggered the apogee drogue /and/ the main chute (which was supposed to come out at 900 feet) at apogee plus 1 second. The BP charges were still a bit too stout, so things got to the ends of the shock cords (40 feet worth) and bounced back together, tangling a bit. Luckily, the 45" main chute opened fine and slowly dropped Thing One about 3/4 mile away.