What type of fabric marker do you folks use for marking lines, for instance diagonally across the triangles as shown in Part 2 of Bonnie's mystery? I have Fons & Porter's lead-like pencil, but in order for it to show, it seems to "pull" the fabric, which is not good diagonally across the triangle, IMHO. I also have the Chaco liner, which makes a really nice chalk line, but since Bonnie says not to stitch on the line in Part 2, it seems the chunky lines of the plastic chalk container might put the the chalk line just a hair too far from the ruler. I've tried the Chaco liner on a scrap, and it looks, in spite of it's chunky design, to put the line reasonably close to the ruler. Any suggestions? Thanks!