I recently dragged out my older machines to take them for a spin. My Pfaff 7570, inherited, kept chewing up the leading edge of my fabric while trying to sew little squares on a 45 degree angle. My Bernina 1120 had absolutely no problem with this. I finished up the day with a renewed love for my Bernina, but puzzled about the 7570. Both of these weigh a ton, maybe a ton and a half for the Bernina.