ABOUT VACUUM FORMING
For those of you who don't know what vacuum forming is, there's a really nice description on Howstuffworks.com
The phsyics is really simple: take a piece of sheet plastic, stretch it across a rectangular frame, and heat it up to a boiling degree. Then, using either a perforated board or a single sheet with a hole connected to a high suction vacuum, a desired object is placed on top. When the plastic is heated to a malleable degree, the plastic is placed on top of the perf board/ board with vacuum. Vacuum turns on, plastic forms around the object, and instant mold!