I have had a serger for years. I use it mostly for clothing but when I do applique blocks, I serge the edges of the foundation tho keep them from stretching and fraying, MIRACULOUS!! If you are having problems re-threading ( a real pain in the neck) just DON'T. Snip the threads at the cones and tie on the new threads, then turn the wheel to hand advance the the new thread. Stop at the needle(s), snip the knots off, and re thread the needle(s). the bottom threads (with the knots intact) will go through the bottom "loopers" just fine. Get a scrap of fabric and serge till the old thread is completely gone and new thread is all there is showing. DONE!!