GiGi was so right to warn you about the digital machines. So sorry. Didn't think of you ladies with machines with tails. I am a treadler. No electronics here - alright - I do have a 401A (great machine) but only use her when I am simply not up to treadling - which is not often. Another plus is when the bowl tips over (I am so clumsy) all the pins stay together. I also use it to magnetize the tip of my scissors.