I have a contemporary shower behind a wall with two entries. Plumbing fixtures aren't visible unless you are in the shower. I have 2 identical set ups with a rainshower in the ceiling and handheld with a combined inlet/holder. rainshowers are 36" apart. My question is where to place the handheld in relationship to the ceiling rainshower. Directly below? To the side? The controls will be placed about 12" inside the entrance to make it easy to turn on. See sketch below with measurements. Any help appreciated - the plumber wants to begin rough in tomorrow!