Because I have all Berninas (1031, vintage 830, vintage 807) I'm thrilled I can use all Bernina bobbins; had never thought about having to keep various machines' bobbins straight.
My biggest problem is keeping different threads on bobbins separated out. Yeah, I have bobbin buddies to attach them to the spool the thread came from, but that doesn't always work and they come apart.
Jan in VA