I cut my first two blowholes this past weekend, on my new aluminum case (and yes, it was a little scary). It turned out pretty well, for all the effort. However, my case got in on the cutting act, delivering two surgical strikes to the outer portion of both of my thumbs... As I was removing the top section of my case. The match ended in a tie, with the case scoring 2 points early, and me catching up with 2 points later in the match! Word of caution to new case modders... Be careful when removing seemingly immovable case parts, because when they do move, they move fast and furious (and if they have sharp edges like mine, they'll cut ya good). 
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