I do not have a LA, however, for my DSM I have extra bobbins, provided the Sewing Goblins have not run away with them. It has saved me hours of time and frustration. I try to have at least 2 bobbins threaded when I begin a project, so when I run out of bobbin thread, I just pop a new one in and continue sewing. To me it's worth it to have extra bobbins, as it not only saves time, it saves the chance of getting frustrated when the bobbin runs out, typically when I just have inches to sew to finish. Except for sewing garments for our DGD I usually try to use neutral colored thread when quilting.