I watched the video for the Babylock stitch regulator. I can't quite figure out what it does. If I understood correctly, there's a control that you have to set for machine speed, and also stitches per inch. The woman in the video had to stop and change the machine speed setting when she wanted to go slower (to make a smaller quilting design). I don't understand that. To me, the purpose of a stitch regulator is to automatically change the machine's speed so that you get consistent stitch length. That's what the BSR does, that's what the SR on my longarm does. Does anyone have experience with the Babylock SR?