casio sk-200 BIG pitch knob?

[rizla]

I've found some really great bends on my CASIO Sk-200, mostly noise and distortion effects on the synth section, but also loads of GLITCHY drum timing effects which are now controlled by an array of push switches and toggle switches.

I'd like to add a few pitch bending dials (and LDR's) to tune seperate elements of the sound, but I don't know how to do this  :{

I think I have exhausted all the possibilities from connecting random points with a wire, so can anyone advise me on how to find some pitch based bends?

thank you