I've just bought a cutting mat, and am now thinking about cutting implements. I don't quilt, but is this how you quilting folk cut out fabric? With a mat and knife? What kind of knife do you use? And is it only good for thin fabrics? I was hoping to cut thicker fabric (up to curtain kind of thickness). Will that work with a rotary cutter? I have a stanley knife but I figured that might be a bit over the top..... I also need to get myself a steel rule too. Thanks! 