Crashnburn
Pattern Altitude
I saw this article in a Kitplanes email. It would be great for anyone who needs to cut sheet aluminum and doesn't want to invest in a sheet metal shear. It also works for plastic and composites.
http://www.kitplanes.com/issues/36_2/shop_talk/Plane-and-Simple-Olfa-Cutter_22285-1.html
http://www.kitplanes.com/issues/36_2/shop_talk/Plane-and-Simple-Olfa-Cutter_22285-1.html