No rolling, just "puddling". Look at that sunshine! So nice to enjoy it at my machine. Below is the quilt I'm quilting. You might remember this pic from during the design process.
Here's a bit of the quilting and I want you to look closely at the difference in the stitch quality here on the back:
I broke one of my own rules on quilt positioning here! This is an excellent example of what happens when you quilt straight lines by pulling the quilt directly towards yourself. Because of the difference in flexibility of the needle, it can throw tension off by just a tiny bit. I usually try to angle my stitching so I never pull directly towards myself. This seems to correct the problem better than trying to adjust the tensions just the tiniest bit for stitching in this direction.
Have you run into this issue? I don't think it'd just an issue for my machine, or for Janomes for that matter, but just a tension issue due to needle deflection (flex). A larger needle can reduce the flex of the needle somewhat, but I'm already using a 90/14 here and don't want to move up to a 100/16.