My serger is a New Home that I have had for well over 15 years. I have used it for dressmaking, and edge finishing on many swaddle blankets of flannel. She has gotten quite a workout! The adjusting knob is frozen! It is a 4 thread and I can now only do the 4thread edge stitch - but that is a all that I have used it for. -- I cut the thread of each spool one at a time, replace the spool and tie the new thread to the old one with a single overhand knot and then, one by one, I pull the new thread through (Have to help it go through the needle eye on 2 threads) but in short order I have my serger rethreaded! May not be "orthodox" but it has worked for me for many years! I COULD rethread it but why? She is a basic serger and has served me well.
I LOVE this Board and you members are ALL AWESOME. Mostly I cannot add to comments others make in threads so I just nod and agree and LEARN -- and maybe I am "lurking" but my love goes out to each of you! And my thanks too!