Thrill of thrills, I have a cold today.  Oh well.  A couple days ago I finished up the plaster form I'm using to heat-shrink the end of a 2 liter bottle down to the point that it fits on a 2 inch PVC coupler.  Today I shrank the bottle down.  In a moment of absent mindedness I pondered the idea of installing a valve stem in a bottle cap to give the bottle end enough pressure to pop it off the form...then I remembered I have about a dozen water rocket launcher heads just laying around...problem solved.  Finally, just a bit ago, after roughing up the surfaces I covered the affected areas of the 2 inch coupler and reformed bottle with glue and pressed them together.  I'd actually be able to finish it up tonight were it not for the fact that I don't have any freaking PVC cement (it's dried up).  Anyway, here's the picture of the form and bottle section with coupler (in case you weren't aware, I'm going to be using a couple pieces off a 2liter bottle to form the air tank on my air cannon.