The outside border on my quilt is 4" wide. I am using Hobbs 80/20. On the package it recommends quilting 4" apart. So does that mean I have to quilt this distance on both sides (4" square)? I would rather not quilt this border because I like the way it looks ditch quilted along each side. However I am concerned about "tunneling". I would appreciate any suggestions. Thanks a bunch!