I quilt on my Bernina so I usually lay various threads over the top like doodling to see what looks the best. With FMQ, you are bound to get some bobbin occasional to pop up so I always try keep my top thread and bottom thread very close the same. I assume with a stitch regulator that you don't have this problem. I always pick my backing to coordinate with my top. Good Luck. Please post a photo when you are finished.