Report "We have a Model #518729 Ultra Deluxe Automatic Blood Pressure Monitor. It was suppose to come with 2 cuffs, it only came with one. I'm thinking we need to order the larger one. Also this monitor reads low. How can we see if this is correct? According to an old wrist BP monitor, this one is always lower than the wrist one. Also this monitor, when pumping up, if it has to pump up for a second time, it really hurts your arm and has left marks on my arm. Will a larger cuff keep that from happening? How much are those cuffs?"