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Adjusting AMEK 9098 mic preamps CMRR trimpots and capacitor?

Dear Friends

Please forgive me, i'm new to this forum, sol maybe this thread discussed before.
I'm experimenting with a diy mic preamp, based on AMEK 9098 mic preamp schematic.
I'd like to know, is there a good/reasonable method to set the input variable capacitor and the two trimpots(LOW/HIGH CMRR TRIM)?
On the attached schematic the parts: VC1,VR14,VR15.

Capacitor Shootout

I recently did some comparisons of some popular capacitors for the electric guitar and I thought I would share the results with you. I tested poly film caps which are the little green rectangles that have been the standard on fender strats for over twenty years. I also tested ceramic discs which are a bit more modern or so I'm told.

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