I am putting the center stars together now, and running into difficulties. Despite careful pinning, both of my machines are sliding the seams out of alignment when I am sewing, and I am having to do a lot of ripping to sew the long seams again. A couple of the fabrics in my kit are old (one of them was dated 2002) and they are tearing along the seams when I remove stitches. I am trying to figure out what I can do to keep the seams aligned so I quit tearing fabric.