I use Superior Bottom Line for all my piecing. Use it in the bobbin & as top thread. I buy it at Paducah & Houston at the quilt festivals on the 3,000 yd cones. LOVE IT!!! Really loads the bobbin & has no linty buildup in the bobbin race. I have even used it for straight line quilting on donation quilts. I get the cones in neutrals & buy smaller spools for the quilting. Give it a try - you can get it online. Merry Christmas!