I have the k2 darkos in a 7.5, my union atlas'seem to be a little to big because my old boots were a size 8, they are m/l. What size cartels would you suggest, a size small or med Or now bindings which model would you suggest, I'm not into park riding due to a severe spinal cord injury, just for cruising and carving. I have a size 147 board. Thanks for any suggestions.