Very difficult to get right in the ditch. By stitching as close to the seam (even in it) on the side of the seam opposite of the side that has the bulk...even if you don't hit the "ditch" exactly...the stitches will be buried (for the most part) by the bulk on the other side.
Depending on the batting & the type of fabrics..some SID hides better than others.
I hesitate when a customer presses her seams open...with those I try to use a design that avoids the seams, or just stitch a meandering line over the seams.
Originally Posted by
CAS49OR
I thought the goal was to aim for the seam or if you prefer right beside it. According to an article on Craftsy the "ditch" is actually the side of the seam that does not have the bulk of the fabric.