When you get to plumbing your sink, the mistake I made in my first darkroom was to put the faucet/fixture unit in the sink. That takes a lot of space. This darkroom I installed the faucet and knobs up high on the wall outside the sink so I have more sink. I have to reach up pretty high to turn the water on and look up at the thermometer but it beats having all that and the hose connections in the way.