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.

I also use Elmers washable school glue and most of the time I do stitch in the ditch. I feel better doing that.

I do an over FMQ I never do a STD with it. I do a large stipple or meander. I always pin baste with large safety pins.

I think part of the reason for using Minky on the back of a quilt is the additional "coziness" and softness of the minky fabric. I have used Minky and did ONLY stitch in the ditch to preserve the fluffiness of the minky. All over quilting would stitch down the fluffiness and kind of defeat the purpose of using that fabric for the backing in the first place, especially if that all over quilting was too close together. Just my humble opinion.

I have used wash-away thread to stabiize sometimes. It works well!

I have been using Elmer's School glue for some time now and am able to FMQ much easier. No need to sitd.

I don't. I do make sure that my FMQ is close enough together to hold everything in place. I've done quilts as big as 60 x 90 this way and it was fine.