Has anyone ever actually tried this with Singer Futura bobbins? My bobbin winder quit so I've been using my old machine to wind bobbins, but that one is now making odd noises. Some say they work on Singer bobbins, does anyone have the one that has interchangeable spindles. I found one of those, but is about $80. Wondering if I really have to pay that much or lug my machine in to the shop. Wonder what would be cheaper. My machine uses 15J bobbins.