I want someone to explain the IDS system to me. I just purchased the base model TLX in silver slate. They told me at the dealership Rizza Acura, that I could shift between econ, normal,sport and sport+ anytime I wanted.What concerns me is when coming off the expressway can I shift from sport+ to econ ,when I am cutting my speed from 75mph down to 30mph or less.Will this hurt the transmission?I know it is ok to go from normal to sport then to sport+ when accelerating. I would like someone to explain the whole thing to me. Thanks, Bobbo1234