mine haven't raveled either, except where i was first starting out and some of the stitches were way too long. they ripped and pulled, but that quilt was for me so i can fix it or live with it.
i knew there was going to be a labour intense answer. now that i have it i think i'll try the small stitch idea or just continue as i have been doing...
i can change it if i decide to enter my quilts at some point in the future.
aileen