Years ago I picked up a treadmill in A-1 shape to make a wet tumbler for free. I cut the frame down to hold one cylinder. Then I looked at you tube, treadmill tumblers. Dang, I could have kept it whole and had 4 or more cylinders running at the same time. Well I picked up another treadmill today. Only problem is it doesn't work. The lady calls it a key, I call it a safety pin. It had a cord and a clip that goes on your clothes. If by chance you fall the pin comes out to shut the machine off. The switch is bad. Plug the unit up plug the pin in, lights come on for a couple of seconds then shuts down. I'll gather what info I can tomorrow and contact the company for free replacement parts. If not, I'll bypass the switch.