Stopped at the Bernina Sewing Center yesterday to discuss obtaining the new walking foot. Learned several things about a walking foot. They have more uses that quilting in the ditch and sewing binding. The best use, and I found this interesting, because I,too, have this problem, wavy borders, one seam always sews longer than the other, puckering seams and the list goes on. That's why is it also referred as an evenfeed foot. I'm not sewing on a project right now, but I going to try it next time. Due to budget, I put off purchasing the walking foot until next week. So, do as suggested, take 3 measurements and averaging, and sewing your border with the walking foot. Good luck.