you might try a pnumatic cut off wheel if you have acesss to a air compressor . Also a jig saw is good just be care ful if you have a dull blade, the wrong blade or try to hurry it can wrinkle the meta" of your case, which looks very sloppy. If you are wanting to just lite the window i would go with 2 or more sheets of plexi and leds. You can use a diff color for each plate and mix your colors heres an article where some one did just that.... They used a routing machine to do theres but the concept with the leds works the same. Pretty cool
http://www.metku.net/index.html?sect...uter/index_eng