I like Sulky blendables,King Tut,Valdani. I use a 16/100 top stitch needle when I am machine quilting on my regular sewing machines. I own a Viking Sapphire 875,Bernina 1031,Pfaff 1222E,antique Singers. I don't have any trouble with the threads on any of my machines as long as I use a top stitch needle.