Hi list,
About a month ago there was a short thread about modifying the
A-135 in order to get at the individual outputs of the four VCA
sections: subsequently the original poster successfully modified his
module. I have recently put a few web pages together, so I thought I
would place the details there, as they may be of interest to others:

http://mysite.wanadoo-
members.co.uk/tstinchcombe/synth/135_mod/135_mod.html

[The site top level is:

http://mysite.wanadoo-members.co.uk/tstinchcombe

just in case the Wanadoo advert bar does anything weird, or I've
screwed-up my HTML/whatever...]

Doing the mod requires adding a moderate amount of new circuitry, and
so assumes some prior knowledge of electronics/soldering. Thus the
information is quite basic, omitting exact pin-outs of the op amps
etc. But if there are any questions, fire away!

Tim