Re: ANTMINER S5: 1155GH(+OverClock Potential), In Stock $0.319/GH & 0.51W/GH
Ofcourse, you need tools (that's a no-brainer) ... a dremel would be a good start .... but definitely not a task to be undertaken by feeble minded at DIY. But like I said, not that hard (does not mean it is easy!)
Having worked at my family's machine shop, programming CNC mills/lathes and Wire EDM's for a few years, if you can do what you're saying with a dremel and have it actually work, I'm sure we ALL would love to see that. 
On another note, to do it properly, it is not financially feasible for a few extra GH/s, considering the time and costs involved.
That's like saying you want to add 15HP to your toyota corolla by spending 30-50% of the value of the car itself and only gaining about 4HP at the end..
Indeed. Pekatete is clearly so much better than us that I'd love for him to teach us how to manufacture high grade heatpipes from scratch. Because its easy, you know.