I’m talking about using a pedal with only a 12k pot (in series with a 50k low limit pot as variable resistor, which however could be set near zero):
in which case you’d presumably want the 10k fixed and 100k pot at the front to be more like 1k and 10k. But yeah, I was thinking wrong about the max current. In that case 12 / (1k+10k||12k).