It was a beautiful day t' fly a beautiful rocket. Aye aye! Well, until launch. Well, blow me down! 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. Well, blow me down! After t' rocket cleared t' rail it started t' wobble, nay loop, but was clearly nay right. It lawn-darted, breakin' t' nose cone, crumplin' t' body tube, ya bilge rat, and spillin' t' electronics out on t' ground like it had been gutted by a lion. Ya scallywag! Only after we got t' bottom portion o' t' nosecone off did I realize that t' Eggtimer Quantum altimeter was missing. Begad! Another expensive mistake, ya bilge rat, but I am learnin' (the hard way) and keep makin' improvements with each launch.