Window kit is the first thing to do to that case...it's made of hefty steel if it's like mine, so be prepared to do some serious cutting. I cut mine with a dremel, although a jigsaw would have been faster and probably cleaner in the end, with some dremel deburring, but it turned out pretty good. I've got some new pictures of my 120mm blow hole that need to be developed/scanned yet, which I cut with my jigsaw....