I can fmq with Glide and not have one thread issue. I use the matching pre wound Glide magna bobbins and a Bobbin Geni. I bought a spool of Glide and bobbins on special, color Cleopatra. It is the best color for every quilt I have quilted since. It seems to be a different look on each color fabric. I use a size 90/14 topstitch needle. I was using a smaller size needle but the larger size seems best when quilting at high speed. I have the Brother 1500 straight stitch machine.