If I had normal feet, the button would be okay, but I have as many plates and long screws as bones, it seems. Not very flexible. Thank you for the answer. I didn't want it to be the machine end.
The button works fine for a certain little dog. Both dogs needed under my feet during the never ending fireworks. Moira, the little Border Collie mix, laid on the controller. I had to move my hand quickly, then move her. No sewing during fireworks!