You will not need a sewing machine with a walking foot, rotary cutter, seam allowance marking pen, or any other fancy tools. Heck, you don't even need a ruler. You will simply use some of your leftover yarn, or some cotton thread, to hand stitch little darts (I call them "pinches" in the pattern because you pinch to make them). It's super easy. If you're worried, grab a pin or two to get them right where you want them before you sew.