I was a bit nervous too. I'm not a good rotary cutter and stacks of fabrics always seem to shift on me. I have a bar tack option on my machine (actually, it's the sew-button-on option). I pinned the fabric as she states in the book, then put bartacks all over. This way I could remove the pins and not worry about the fabric shifting or running into pins with my cutter. Also, put a fresh blade in before you start. As another poster stated, it's pretty forgiving.