I was watching a tutorial the other day and the instructor had one of the large spools inside of a quart mason jar set next to her sewing machine, and then threaded the machine as usual. I bought a separate thread guide to hold the spools some time ago, which works fine except it cost me about $15 for it. I always have at least two machines set up for sewing so I used a larger jelly jar and dropped the large spool into it and threaded my singer machine and it worked great! I then moved it over to my bobbin threader and used the spool/jar and loaded up several bobbins it worked fine too. I am not to great in thinking about new ideas, but I am quick to borrow any good idea that someone has. Try this and see if it works for you. I think the jar should be glass to have enough weight not to move around or take some silly puddy to hold it from moving.