Hello! I use CT 50wt on my quilt machine and it works just fine. Maybe a little linty but I think most threads are. I also use Aurifil when I can find it on sale as it is a little pricey. Any thread left on the bobbins from both threads I use for piecing so none is wasted. Right now I'm going thru a bunch of my regular threads as well as the threads that came with my quilt machine for piecing as I didn't care for how they worked on the quilt machine. Its supposed to take any thread but if I have to fiddle too much to get the tension correct, I go back to my old tried and true threads which is either CT or Aurifil. I did pick up some of CT polyester threads in the large spool but have yet to try it out. If my machine doesn't like it either, then it will be used to piece with. Our hobby, in my opinion, is too expensive to waste any of the stuff we use for it such as fabrics, threads, stabilizers, etc.
Suz in Iowa