Is 42 inches wide enough to keep a doorless shower from spraying out? It will be an "L" shaped shower, with the walk in part in the foot of the "L" We want to put the valves on the wall where you would walk into. That would make it easy to turn the water on and get it to the right temperature without being in the stream. We have 6'1" for the length of the shower. Does this sound feasable?