Starting construction...
Basically, as my dremel is recharging, I am taking needle nose pliars and folding the fins back and forth until they come off. Pretty easy, and a lot less messy than the dremel cut that I attempted. As you can see, I have decided against a peltier setup for the GPU or NB, so I will be doing a direct core-oriented design with SA directly over the core and high velocity flow through the fins. The blue stuff is what I am cutting out. I will file the leftover stuff off, or maybe just take it to the grinder.
Since I have nothing to machine O-rings with, I will be using a blue RTV silicon bead around the perimeter of the fins for a good seal. This should be re-usable because it is not like glue and basically forms an O-ring wherever it sets. I wont go crazy with it like other people and glue anything that moves, so the end result will look clean.
Note to self: next time, buy an AC dremel, even if the cordless is on the sale rack for $30...