I have an original unit for repair (the chinese footswitch broken), and I looked the pcb. I can confirm without doubt that this layout, and all the other and schematics I saw in Google are very different to the original. In the pcb says it's version 3.1
For example:
- Level pot is B100k.
- Attack switch is on-on.
- I can see two ceramic caps of 220p ( in this layout there's only one).
- No 4148 diodes exist.
- No 22p cap near TL072.
- An extra 470k resistor near Attack switch.
....
And a few other different things.