Instead of buying a light box, I have a sew-steady table (clear acrylic) that fits up to my machine. I have the large one. I lay my Ott-Lite under it, tape the pattern (which I have copied on my printer) to the top of the table and trace the pattern onto my fabric. Of course I can't do it once I sandwich the batting and backing together. I am interested in that Pilot pen. I use the blue water-soluble pen. The problem is I live near the ocean and my sewing is under the window that gets the ocean breeze so after a time the ink dissapears!
I have also heard that if you use the air dissolve purple pen and don't wash the fabric soon after that it "burns" a mark into the fabric even tho it seems to have dissapeared. I have only used it for clothing so I don't know but don't what to find out.