I actually have the blue dot bobbin with my Janome 6600, and I found it was not adjusted tight enough to get good stitches. I adjusted the tension screw tighter and kept playing with it until I was satisfied. I practiced on a sandwich of like material as the quilt before I put my quilt on and the results were better that way. I have also turned my machine to face me and fmq'd like on a long arm. This works when you have such a big quilt to manage. Smaller projects I don't do this but I do make sure I use the super slider mat to make the quilt surface slippery and have even used spray wax to polish the machine bed. Sprayed on a paper towel and polished the surface before beginning. Good Luck.