I was going to put a 250mm fan in the side of my antec P180 case to get good air flow with little noise, but since I have little experience with cutting cases (a while ago I made a side panel but thats it), I thought I'd practice on the case of my old PC first which needed a case fan anyway. I picked up some heavy duty cut of bits for a dremel thingy, but when cutting I ground 3 bits down to nothing and shattered another two and only got about 1/4 of the way round the circle (I then gave up on the dremel and hacksawed and filed it to shape). The case looks to be 1mm steel. I just wanted to know, will the antec case (layers of aluminium and plastic) be as hard to cut??? Has anyone found actual saw blades rather than grinding wheels for a dremel (I couldnt)? I cant hacksaw and file the antec case as I want the fan hole in the centre of the side panel. I was thinking maybe drill holes every 10mm and just dremel between them? Thanks Chris ps. dont suggest a jigsaw I spent 20 mins trying to clamp it down so it didnt jump up and down and only managed to slightly reduce the amount of dents the panel ended up with.