Hardware Modifications?

I was wondering what some cool Xbox 360 hardware modifications I can make, it can involve soldering etc (I am a soldering God!), and please don't make it an expensive project. I would love to hear about it, but guys I'm broke! Please post below your custom stuff! Thanks!
Also, I have all the tools required I think, like a solder etc

 

The only hardware modifications I can think of are the RGH or the faster fan mod.

 

This is a phenominal LED mod that would be a serious project,,but I saw it and had to put it up
http://www.youtube.com/watch?v=uAfXjnkY1tw

This is a practical mod that can be done fairly easily and kits are easy to get for many types of "sound activated LED's"
http://www.youtube.com/watch?v=YNRYP8Wm28c

 

that infinite mirror looks pretty easy to do....wire up some LEDs to a resistor(s)then splice into the power button add a couple mirrors...done.

 

I will try to do this eventually, gotta wait till a boring weekend. Thank Begal as always!

 

That second one would take me a whillleeeeeeeee...Looks hard, but, it's awesome!