this seems unecessarily complex - but reading everything here i would go for the DHP option. At the very least, you have all variations of ability in your suspension and aren't wondering if it is "too hard or too soft."
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2014 335i RWD: ZMM, ZDA, ZDH, ZPP, ZTP, 2NH, 2TB, 5DL; Z4A MPPK; AW ext / VB int
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