Always wanted the Lastgasp Art Laboratories ‘Rattle Crow’ but could never justify buying, accidentally found a stripboard layout the other week so I built my own. Transistor and diodes are different so no idea if it sounds the same but it does do horrible harsh filter stuff. Added an input attenuator since the level of the input makes a drastic difference to the sound/sensitivity
Bad plastic junction box housing I might replace some time, bit too bendy