http://www.connectingthreads.com/too...l_TD81088.html This is a guide that you put on your sewing machine bed so you don't have to draw the lines on your fabric. I haven't used it but know several quilters that have and they just love it!
heres 2 you tube video showing how it is used
http://www.youtube.com/watch?v=sYWwMCllt_8
http://www.youtube.com/watch?v=1CDjiNwjdxQ