Customers at Purl Patchwork are alternately fascinated and terrified by rotary cutters. On one hand they make cutting fabric so accurate and easy, but on the other hand they're scarily sharp and the process of rotary cutting can seem mystifying and overly mathematical. However, with some practical guidance, you will be able to use a rotary cutter properly, and believe me, once you get the hang of it, you'll never look back!  If you'd like to join the rotary cutting ranks follow along with my Rotary Cutting Tutorial. --Molly