Originally Posted by
Cari-in-Oly
HQ machines use M class bobbins.
Cari
My Q'nique also uses M class bobbins. I use two bobbin cases, one for the bobbins with magnetic centers (magna-glide delights by Fil-Tec) - this requires removing the metal insert from the bobbin case itself) and the other with the metal insert for regular bobbins. They both work well. For tension control, the Jamie Wallen method has helped me a lot.