Can someone provide a website as to where to get, prices and how to use a walking foot. I just use my regular foot for stitch in the ditch and it seems to do fine, however if there is something better out there I would like to try it. From what I have seen they look big and complicated. I have a Bernina Activa 135 sewing machine that I love, it seems to me that their walking feet are over $100.00 and I am just not willing to invest that much without knowing if it will help.