The DW is concerned about the fancy shower head/unit on our 351M that is currently in production. Is there enough water pressure? Can the shower wand be replaced? Can the whole unit be replaced without destroying the shower surround? Should we get chrome (instead of black) so we can replace the shower wand with a Oxegenics to increase pressure, if there is a need. Has anyone done this yet? Any thoughts would help. She thinks we want to get a second shower unit now from GD, in case the first one breaks and it's a manufacturer only product. Thanks in advance!