Instrument cluster refresh

Hi A Bodies, working on my 70 Duster cluster. Taken it all apart to clean and refresh paint. Couple questions, does the Standard dash lighting look better with the blue diffusers out? What LED replacements are you using? Should I do a voltage regulator update on the circuit board and what is the update? I will be repainting the needles, does the black cap on the speedo come off? Any other tips would be appreciated. Thanks.

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