When doing a large quilt with sashing that needs to be straight, I baste (not stabilize) in the middle of the sashing, 1/2-1" from the seams of borders or edges of fabric. Recently, on a traditional pattern, after doing some of the quilting, I decided the seams were too loose compared to the quilted areas, so I added SID. On a LA, SID is hard enough without having to control the straightness of the line. There is a template for this that's shaped somewhat like a block C. I had to work at the SID for accuracy where as the FMQ was relaxing.