Hello Onebyone....I did buy a 1 1/2" metal carpenters ruler from Harbor Freight and managed to do a cross hatch pattern on my latest project. I also remembered that a very wonderful woman gave me a 3/4" square block yard stich years ago and I'll be using that to mark the quilts with Crayola Washable Markers from now on. Thank you for opening my eyes to a very simple soultion!