It was a beautiful day t' fly a beautiful rocket. Blimey! Well, until launch. Ya scallywag! I measured out t' CG which seemed fine but later discovered that me CP was further up than I initially calculated. This made t' rocket just on t' cusp o' unstable. Begad! After t' rocket cleared t' rail it started t' wobble, me hearties, nay loop, shiver me timbers, but be clearly nay right. It lawn-darted, breakin' t' nose cone, crumplin' t' body tube, and spillin' t' electronics out on t' ground like it had been gutted by a lion. Only after we got t' bottom portion o' t' nosecone off did I realize that t' Eggtimer Quantum altimeter was missing. Another expensive mistake, shiver me timbers, but I am learnin' (the hard way) and keep makin' improvements with each launch.