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Put Plexiglass in your computer in less than an hour.
Step 1Cut the case
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This is a pretty obvious step but whatever. A more obvoius step would be to remove the side of your case before you begin cuting but again this it up to you. Unless your incredibly brave you might want to preclude this step with some thought and some measuring and marking and whatnot but after the step requring carefull thought you can go to the step requiring powertools . I used an adustible hole cuter set a little over 4 inches if you dont have one you could use a jigsaw or just a normal hole cutter fom your local home depot the adjustible one you can find at woodworkers warehouse. At any rate clamp the piece down very well, wear eye protection, be sure to lubricare with wd40, and most importantly take your time.
used the coolest tool for the purpose i borrowed from my welding instructor
called a chassis punch a really epic tool that made perfectly clean holes only needing a light sand to take the burr off
Drill hole for the bolt
then thread the other half of the tool on and use wrench and ratchet till it cuts all the way through
boom perfect clean hole
they're expensive but so awesome for something like this !!! ( we did not even need to remove the internal components really just lay in a towel for the shavings for the pilot t hole.)