Here are a couple of patches I made, trying to do various dubstep style growls. I used the Preen FM 2 editor.
On dub Growl 4 I used the Free Envelope 1 to modulate the Sample Rate of the Crush FX.
Also, I used the waveform TX45 from one of the other posts as Shape 5.
It made me wish that I could modulate the attack of the Free Envelope 1 with Velocity. I also want to look into writing a regular type distortion FX.