[sdiy] MG-1 Mods (patching it out)

[mmanard at columbus.rr.com]

I have a second Moog Mg-1 and the keys and sliders are all but 
destroyed, but otherwise it works. I'm going to put it behind a new 
panel/case and mod as much as I can think of possibly patching it out. 
I'm thinking of adding an ADSR and an Analog Noise (white/pink/low 
freq) from the asr-1 schem.

Anyways to my question:
I still want to use the AD(R) generator onboard too but I've found a 
small issue. The output on the EG is never 0v - it is always about .5v  
which is fine for most mod routings but I wanted to route it to the 
OSC2 freq which makes it slightly go sharp. Any ideas how to correct 
this?

I'm getting the EG output from Pin 6/7 of U13.

Here's the schematic:
http://www.geocities.com/gallomagnetix/mg1_control.jpg