Here is a winder to wrap the thread ends on a spool. the model very snugly fits over spools with 17 mm OD cores. probably needs to be increased by 1-2% for an easier fit. and can easily scale to fit larger cores. the winding section can snag your thread so be aware of that. Advantage here is that it can remain on the spool if your machine holds the spool vertical or horizontal perpendicular to the thread feed. i don't expect it to interfere with the thread feed, but stranger things.....