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Working to miniaturize CN0359 reference design

I am currently working to miniaturize the CN0359 reference design. I would like to reduce as many of the 0805 resistors and capacitors to 0402 as possible. That being said are there any portions of the circuit that I should pay special attention to with respect to tolerances, ESR, ESL, impedance vs frequency, DC bias etc? I'm not looking for a list of each component (although if you have that already I would take it), but more guidelines from someone that knows more about this circuit than I do. Thank you!