To answer the questions that were posed to me-
Permanent meaning that I fixed mine about a year ago, and friends boxes roughly six, five, and one month ago. All different boxes, none of them have had problems since.
Tools-Pretty much household tools, yeah. All you need is some small screwdrivers and some torque drivers(those little screwdrivers that are shaped like *). Those you might not have lying around, but theyre cheap and everywhere. Home Depot, Sears, Radioshack, etc.
And no, you don't need to be an engineer, just be careful, try not to force things too much, at you'll be good. Common sense is the prevailing rule.
I actually skipped the clamp replacement altogether, and just replaced the heat paste, and added washers to the X-clamps. No muss, no drilling, a lot easier.