I thought I'd share this. GIna's downloadable file of the foundation marking guide is full size. If you have Corel Draw (or Bernina design software, which has Corel Draw in it), or even if you have Excel Spreadsheet, you can print it out full size in sheets to tape together, which is what I did. I measured all the pieces after I did this and they are accurate. I then marked it with my light box, using rulers to help keep the lines straight. Worked great. For Corel Draw, use Print Layout and tell it to tile and print size "as in document" (consult the help index to find complete instructions for tile printing). For Excel Spreadsheet, you insert the image in a spreadsheet and print it out. Both will auto tile for you. You may know of other ways to do this. It really made it clear where everything goes.