Value for R2 in pimeta

[Kippei]

I search around the forum for this R2 value.
I still haven gotten a clue.

If I use a 10 k pots, the value would be 100k , some will recommend 1m.

Need help

 

[skyskraper]

i would use the 100k or whatever 100k-1m you have lieing around.