So Fine Thread
With my old machine, it wasn't fussy and I used Dual Duty for decades and didn't think much about threads. When I started using my friend's long arm, I got a bit more into threads but it is a recent thing just the past 5 years or so.
I just tried using Superior's So Fine as a bobbin thread in quilting my most current project, it was nice to work with and zero problems! I'm happy with my tension, my results, how my machine handled it. I'm going to get a couple more cones in useful quilting bobbin colors.
So here's the big question -- do you use it for your piecing bobbin or just for quilting?
I am a big believer in pressing and use a pretty hot iron if that makes a difference.