I have a bernina 153 QE. I was looking for a start/stop button and guess what I found?? My Bernina has a 1/2 speed button! I kept reading about how handy this would be but never thought to look at my machine because I thought it would only be on newer models! In my defense I have only had my Bernina for 7 months! I guess I should get out the owner's manual and read it before I do any more FMQ! DUH!