Here are some older consoles i've done....

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Here is one of my modded NES. Put a blue neon light in there also, looks cool and the kids like it  
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<img src="http://turdinc.kicks-ass.net/Msntv/ps2/nes.jpg" border="0">
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Real old school stuff    :D 
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The one on the left is the original atari 5200 controler and the one on the right is a modded one so I could play Kaboom! and Pole position. Don't know if any of you ever played Kaboom with a joystick but it SUCKS! One of my all time favorite games so this mod was a must! Took apart a 2600 paddle and used the handle and pot out of it. Baught the switch you see on the top so I could shift gears in pole position. It works awesome. There is a site out there somewhere that explanes how to hook the wires up. 
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<img src="http://turdinc.kicks-ass.net/Msntv/ps2/5200.jpg" border="0">