If I remember right mode 2 is where you move the fabric and it starts to stitch. I think my book says that mode 1 is where you disconnect the foot pedal and it sews automatically. I always use mode 2. I've taken classes using my 430 and the teacher (internationally well known) said you don't really need the BSR. She quilts without it. She just lowers feed dogs and uses her foot on the pedal at the speed she likes.