five fin fin-can

Fin can for BT-50 body tube. When used with http://www.thingiverse.com/thing:345464 and 18" BT-50 tube, the center of pressure is just above the fin-can. via openrocket.
No, not flown yet - but getting closer! [flown! see below]
wt: 21 grams
updated 6/22/2014: enlarged the lunch lug to fit 1/8" rod [to 5/32"], split launch lug in two to make it easier to drill out. Hope to launch at URRF, http://urrf.org/
updated 7/1/2014: Flew at URRF! an A8-3 motor is a little light, with an altitude