Glenn, It's not 100% smooth when I just pull with the bobbin. With each step along the way of threading it, I get a little more drag so that by the time it's fully threaded it has more drag than I would like. I can still pull the work away after stitching but have an easier time pulling it to the back and slightly right. I've had no luck at all seeing a difference in tension loosening the screw.
The bobbin I have has little pointy ends and one is a sharper point than the other. Should they be pointy? Or maybe that's the problem and I should blunt it down?