I am going to mod my old case, I want side window with intake fan and a blowhole. My case is an old fasion one (steel not aluminum). I know I can use dremel and/or jigsaw, but I just came back from CompUSA and saw one of those little tool (nibbler) to cut steel, aluminum. Have any of you guys tried this tool? It it easy to use and strong enough to cut my steel case? thanks for your opinions.