I've been using huge cones of thread on my domestic machine without any problem. At the beginning I used a clean jar that I placed the cone in and then ran the thread up the wall and through a cup hook (at one time I just put a piece of tape over some batting and taped it to the wall to run the thread behind). I just thread the machine normally. I did eventually buy a cone thread holder to set behind the machine. I think the jar idea would work with the large spools, so you could lay them on their side. Good Luck!