I have SITD on all my quilts; at least I have something to follow :-) ; haven't had the courage yet to FMQ by that is coming in my next one. I have found that if I have trouble staying in the ditch I just need to slow down a little bit or adjust the weight of my quilt. I've had to pull a few threads but if I use a neutral color I don't really worry about it because it "fades" in to the background.