Syncussion DRM1 tweak - link / add CVs to the potentiometers

[curtismodul]

Hello, I would like to add cv inputs to my Syncussion DRM1 on few sound's pitch pots. 

I found about http://www.bridechamber.com/VC_Res_PCB.html
And here http://www.midibox.org/dokuwiki/doku.php?id=midiboxfx_-_midifiying_analog_gear#analogvoltage_controlled_resistors is some more informations about modifying pots into cvs.

There, the "OTA" and the "Resistor ladder network" options looks good but I can't just do it with my actual knowledges. Also there is not really much informations about the resistor ladder network.

I like to diy kits but have no "deep understanding" in general electronics. 


Could anybody help me with this ?