I thread baste with the tatting thread and herringbone stitch as shown by Sharon Schamber. I've not had a back shift with this method. As far as stabilizing with SITD, I know this is recommended by some, and I even watched a video about it, where the teacher showed the same quilt with and without the stabilizing stitching. My question has always been, doesn't it look awfully messy on the back? So no, I do not SITD before an allover FMQ design, because I want the back to look good, too.