That image is not so right about the mod you want to do, so I'm not sure if you did it correctly.
I try to explain it, maybe it's just a lacking of experience.
First thing to do is disconnect the emitter from the ground. You can make a cut track to the left of the emitter.
Following the pot wiring, that one lug goes to the ground, you can put it close the ground wire. The other two lugs goes to the emitter, any spot of the track to the right side of the transistor.
That pot put, when it is at max, the emitter in contact with the ground (like the original schematic) giving you max gain. When the pot is at min you got 1k resistor between the emitter and the ground, decreasing the gain.
I built the Bazz Fuss, one of my first pedal, but I don't remember I never tried this mod, so I can't tell you how that works.
I hope I helped you.
I build pedals