Here are some vids of my first 3" shell and a 3" star mine.
Good work! Did you have two types of stars in the shell? It looked like there were glitters and charcoal streamers in there. The timing looked fine.
Try pasting 3 or 4 layers of kraft over the plastic or a few wraps of fibreglass packing tape - it does improve the break. I find that my plastic shells tear apart around the seam when they burst - the joint made with plumbers solvent cement is stonger than the shell case itself. 5g or so of granulated hot whistle sprinkled in will also do wonders
The mine was impressive - maybe try a slightly faster star (or one with finer charcoal) for less fallout.
Edited by BrightStar, 02 June 2008 - 08:35 PM.