just wanted to throw up some additional information.
personally for a battery, I would use motorcycle racing batteries rather than a dynobatt due to price.
heres my preference
12v
Also heres a great writeup about ligher car batteries
batteries
mumm brother's has a fair amount of info up on their "reduced" cougar which is worth looking at.
mumm
ok so this guy drives a saturn but has one of the best documented weight reductions.
saturn
my last suggestion is not to use plexiglass, I see that being a safety hazard. You want to use lexan [also known as poly carbonate]. I can post links on how to properly work with it if anyone is interested.
