Doepfer

I'm trying to modify my old style A-131 Exp. VCA module to get a 
gain >1 as the output often seems weedy and I would like the option 
of a little (or a lot of) overdrive.

I'm guessing that I can do this in 2 ways:
1. change the resistors connected to the audio In pots to a lower value.
2. change the resistor connected to the output voltage of the CV circuit.

So the question is... is there any information in english that will 
help me identify the correct resistors to change?