Thank you Geno_3245. I read the link you included and the one referred to in its thread.
The corrugated all stainless steel flex lines from Falcon or Rino look promising, but I wonder would I need any kind of dielectric union where it connects to rigid copper / yellow brass lines?
Is there any galvanic action between stainless and copper, or stainless and yellow brass?
Since I am not in an area known for a lot of seismic activity would the corrugated copper flex lines eliminate the potential for dissimilar metal corrosion and be more advisable?