I have the one from Fons and Porter that I got at JoAnn's with a coupon and a gift certificate. The vinyl side has the lines but they show through to the flannel side. I use the design wall all the time but never the lines. I"ve never considered the lines accurate enough to know if something is straight and when I'm using my design wall I haven't sewn all the pieces together so how do you allow for seam allowances and still use the lines?