Is there any way I could accomplish part of my goal without getting into the complex work you described? For example, what if I left the controls alone but tried to replace just the faucet, for the drip issue? Or if I were able to locate the exact same controls, would it still require all of that work to replace them? I ask that question because the pressure knob is slightly broken, after being overtightened in an attempt to slow the drip. I’m concerned it may eventually break more completely.