Who hasn't been stitching along for naught! It is particularly infuriating when intricacy involved lots of pinning. As for stitching with bobbin on top, I tried with metallic thread. I thought I needed it on top and bottom to stitch. Eww. big mistake, but still have fully wound bobbin of metallic thread that does not work as a top thread because it bunches. I set a personal goal of winding 3 bobbins at a time when in winding mode. I am impatient when sewing gets interrupted!