Things you should know:
1. This design isn't very strong.
2. Use matrix sensors; the ones they use are liable to suck.
3. Use lexan, but make sure there is more to support it in the center.
4. Because I have decided I hate this design with a passion, I will design you a superior one for free; it's not you, it's my superiority complex.
Also, this has already be posted.
Like, 5 times.
[/fiery, passionate, random hate]
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I used to be active here lol