Finally I seem to have cracked it! After a long evening of quilting in the ditch, I got to the FMQ stage which I've been looking forward to. And I managed this entire section with no thread breakages and no skipped stitches. I'm putting that down to the full combination of Aurifil 50wt thread, topstitch needle (which I've been using all along) and the spring-foot unstead of the sensor one. But as much as I want to continue, it's 2.30am, and James and Eleanor have swimming at 9.30 tomorrow, so I'd better get to bed!