Hello! I've just recently built this and unfortunately I am unable to get the circuit to do flanging "automatically" the rate pot does nothing.
I am however able to get a sort of a flange when adjusting the "clock" trimmer by hand and also the Manual and Depth pots. I have tried re-flowing the solder through the whole thing, but seems it just won't work.
Used JRC4558 instead of NJM4558(reckoned almost any op-amp would do).
Instead of the tl022 i used LM358P, as I've found people describe it as a substitute, also I found some dude online who posted the boss bf2 schematic with lm358's.
Aand lastly I didn't have any 20k trimmers, so VR5 RES and VR6 BIAS are 50k trimmers.
Has anyone encountered such an issue?
If you do need voltage from the IC's i could do that for you, but I haven't ever done that so would need an explanation on how to do that.