We are completing a remodel and just discovered that the plumber has installed the on/off - hot/cold handle way up on the wall closer to the shower head and the diverter valve just above the tub filler. My young daughters love to bathe and, with this configuration, they will have to stand up to adjust the water temperature or turn the water on and off. The contractor tells us it's "fine" and "it works" even though we have addressed the safety issue. My elderly mother will be moving in with us when she can no longer live alone and will also be using this bathtub. Any thoughts on how I can convince the contractor that this needs to be corrected?!