I use Connecting Threads Pro Poly on the cone. It's not linty and it is size 70. I like a thin thread for piecing. And the 70 wt makes great bobbin thread. I can't tell the difference using it in the bobbin then Bottom Line, Finishing Touch, or Aurifil 60. I've used the Essential thread and never noticed any blobs. It's great for vintage machines. My old Singers I can use any thread, even crochet thread.