Erica Synths Black Joystick Controller is a manual command center for your modular setup, it also generates several sets of CVs and alters incoming CV signal. The joystick doesn't have a spring.
Features
 
Four unipolar 0-10V CV outputs
Two bipolar -5V - +5V CV outputs
Two inverted -5V - +5V CV outputs
Two CV inputs
“Dead zone” in the joystick centre
setting for 0V CV output
Skiff friendly design