Never hand quilted before. My wife has done some sewing, not much quilting. (I used to be a mechanic at a Wrangler jeans factory.) Not too worried about shifting as long as we go straight down and through and and up - but any kind of running or rocking stitch could be problematic, trying to squish down all the batting.
It's not so much anchoring the layers into place to avoid shifting as it is making sure we've got a smooth circle on the bottom. Thought maybe I should sit underneath so I can see where to poke the needle back up??
Ed