I agree with Judy, my machine likes any type of thread. I use Metro or King Star most of the time, I have used Sulky and even Coats and Clarks glow-in-the-dark thread I got at JoAnn's. I use polyester 99% of the time because it does not bleed like Rayon and I've even bleached the baby bibs and no bleeding. I have a 6 needle and run it a high speed and no problems. emblibrary.com is an excellent place to buy designs, prices are great and if there is a problem with the design you can contact them and they will fix it or refund your money. The site has lots of tutorials and ideas.