OOH, just the question i was hoping somebody would ask, I have put a plexiglass window in the side of my solid case! It's not that hard, and it's prety inexpensive. If you feel scared about taking powertools to your case, this is not the thing for you to do. I just, measuresd out where i wanted the square hole, i drilled a wide hole in each corner, and used a jigsaw to cut out each side by starting it in the corner holes, then i cleaned it up using a hand grinder, bought a piece of plexiglass which was cheap, and used clear caulking to secure it, it worked great and looked fantastic. It was my last project, a small, micro atx computer, my new computer is much better but i still like that last project because i made it look cool. =)