im currently working on modding an old gateway my dad brought home and i started to try to cut out the window with my dremel and i relized 1. the metal is thicker than most cases, and 2. the #420 dremel bits get screwed up/torn up/broken wich i can understand considering the metal. i literally have a cut about 1/8 in long after i think 3 bits.... so agrivating. does anyone know a better tool for the job or does anyone have any suggestions? thanks