I got my stim for my foot and if I don't turn up the intensity I do not feel it in my foot. When I turn it up real high I then get it in my foot. I do not get any sensation on my spine of my low back but do get both sides of my back. I have mine set to were I can turn the intensity of my back down and foot up if needed. I am suppose to meet again for another tweek session to try and get spinal coverage. I let you know if it helps. Maybe than can tweek yours and figure it out. Hope you can get the coverage you need.