Just curious. Do you piece and sew with the cone thread made for serging or are you talking about some other kind of cone? I worked for a Bernina dealer who made her bread and butter by doing custom dressmaking and alterations. We never used cone thread meant for a serger with the machines in the shop. I know that they now make cone thread for longarm machines but it is not the same as serger thread. I purchased one of those little machines to wind bobbins and I love it. I always hated to have to unthread my machine to fill a bobbin. I got the one made by a man in Floridia. It is not only very useful but I kept the money here in the good old USA.