Anyone interested in the Slidewhistle paper rocket will note that I have now test-flown one (click here to view the March 11th launch log). As a result of that first test, I recommend dripping some glue into the "nose cone" for added strength. I'd post a picture of the blowout, but I threw it away.
Here's a picture of my prototype "Slidewhistle" rocket (named by my daughter, and no I don't know where she came up with the name). Click the picture for a larger view. (The image shown here is of the first prototype.)
A PDF of this model is available; click here to download it. Preliminary testing (swing test, mainly) indicates that it is stable, though I think it may be prone to spinning in flight due to the difficulty getting the fins straight. (I'll know more after an actual flight test, of course.)