umm...I may go for a design decision. Leave what you have done, then change directions for the last two boarders. Make the quilting lines which your walking foot parallel to the seam line. It would be much easier to do. Stitch one line, use your quilt guide or even to edge of walking foot to line up with the just stitched line, end the first line, just slide the quilt back to the beginning and repeat until done. For the corners you could draw a diagonal line ending each line on that. For your partially stitched border, you could rip the stitching out or just start the parallel lines there. I would tell people I designed it that way for a modern look. Tee Hee.