Oh,another tip she gave us was to try a 3 ring binder under the back of your machine to tilt it. A lot cheaper to try than a fancier gadget and I know I have a few lying around my house. She said to try different sizes (thicknesses). And you know why they have that rail at bars? (Not that I frequent them, mind you). To rest one leg on, to take the pressure off your back. (And then you'd stay longer, I guess). You can put a little box under your cutting table and put one foot up on it once in a while to do the same.