(Simple?) expression request

i think "simple" i'm new expressions, , appreciated.

 

i have group of subcomps have adjustment layer effect applied (digieffect's damage, specifics don't think matter). want control adjustment layer effect "control layer" adjustment layer found in main composition. looks this: main comp w/ adjustment layer w/ de_interference, , want link of tweaks make adjustment layer adjustment layer created in each sub comp same de_interference effect on it. see can't pickwhip whole effect whole effect, individual subgroup of parameters, "source_blend" or "random seed", etc. possible parent sub comp adjustment layer effects control adjustment layer effect? thanks.

in cc can copy effect links via expressions.

 

but yes, can link many of parameters like. once you've linked in 1 comp, copy , paste layer rest of precomps.

 

pull timeline panels apart have both main , precomp's timelines visible, twirl down effects layer , pickwhip values want change in precomp corresponding values in main comp.

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