Info from Rick:
Width pot added, this defines how broad an LFO sweep the OTA's see
Shape pot added, waveform now continuously variable from upward sawtooth through triangle to downward sawtooth
The original Depth pot has been re-named as Range, and defines where in the audio spectrum the phasing happens
Here's a comprehensive demonstration video from keto:
Modification: Optional "wet only" switch detail added.
Modification: Optional "Speed" switch: