Depends on my machine, my sq[9050 is the left, my espire was the center, and my dreamweaver is the center, and my xl-3500i is mechanical so it was wherever the hell I left it, center right left, had no default, all machines are brothers except for the espire which is made by brother and has babylock's name on it. I actually hate that it is left on my sq-9050 because i forget to change it and my needle hits the 1/4" presser foot.