Chopped OC-2 Vero Problem

[megalodon]

Hi, I've built the chopped oc-2 with my own layout and I'm not getting any octave down, just the clean signal and a filtered clean signal where the octave down should be.

I'm getting the octave down square wave at the gate of the FET, so I think the circuit's fine up to that point, but I just can't seem to see where I've gone wrong after that.

Any help at all would be massively appreciated, cheers!

Layout (Ignore some of the weird jumper placement, I had to add some after the fact):



Schematic:

[megalodon]

Additional info:

Q1=J201
Q2=2n3904
D1=Ge
D2=1n4001
D3-D6=1n4148

I know it's got to be something obvious, it's driving me mad.