Your setup is backwards from traditional. typically your drogue is in the lower section with the main under your cone - this makes it possible to use your motor as backup deployment. Your arrangement makes that impossible. Still curious what size pins your using and how you plan to cut them - cardboard alone will not.

__________________
www.wooshrocketry.org NAR Sec. 558
Look us up on YouTube: http://www.youtube.com/user/guytogo75?feature=mhee
unstable by design