Harriet Hargrave also sets her straight lines with SID.
@Marylinsue: I wonder how much the layers would be able to shift around the SID. Never gone outside in but then I've nver used washable thread to baste either. Clever girl, you! I'd give it a try. One of the tutorials by Jenny Doan shows her daughter quilting from the edge inward. It was a small quilt but still.......