I use Bobbin Genies in all my machines. It really makes a difference. I don't have nesting or thread eating and the tension is smooth and even. Some think they don't work but I found the guild members that say the Genies don't work did not take out the tension disk in the bobbin case. You need to to that. It's simple to take out and put back, just don't lose it. The Genies work best for metal bobbin cases but I use them on my front bobbin loading Janome. I use prefilled bobbins 95% of the time.
Last edited by Onebyone; 06-15-2014 at 09:23 AM.