I'm having trouble with this build as well. I've knifed the gaps and reflowed the solder a couple of times and nothing. I'm still not getting any signal what so ever.
I'm able to trace the signal all the way to the 1uF cap, 510K resistor, and the B leg of the transistor in the upper right corner of the board but can't seem to figure it out from there. Maybe that's why this circuit is still unverified? Has anyone successfully built this pedal yet? Any help would be greatly appreciated.