I just purchased a 18x24 sheet of .093 thick Lexan Polycarbonate to replace my Obsidian 800D's stock clear panel. I need to cut it to fit my 200MM fan. Best tool to do so? Maybe use a sharp ass exacto knife and make multiple passes against a straight edge? I just am going to cut a square, so it shouldn't be too difficult. I don't have a dremel but I'll get one if it's better.