Do you have the ground connected to your output jack on the Cetus? That other ground terminal at the top looks unpopulated and I don't see any ground wire coming out of the jack in your build report.
I just built the Cetus and I can confirm that this drill template worked.
It's essentially just the 5 knob with the LED moved down. I assume it'll work with any of the other V1 pedals as well.
