Yes, it is basically the VoxWah V847 circuit simulated, with some mods made by me to make it a Bass Wah.
It comes now with 3 modes to select from, bass, mid, orig.
The envelope is handcrafted and comes with peak and range control, additional it has a tone filter and a drive switch, and a gain control. Here is a shot of the controls so far:
I'll load it up soon to my github repository.