After the mayor step (and cost) of the system startup, it is getting easier. I had time to get used to the modular way of patching sounds (comparable to plugging multiple guitar pedals together) and time to think & decide in which direction I should go upon expanding.
A joystick was added as main controller (besides the keyboard of the Minimoog Voyager), a couple of multiples and a clock divider too.
The filter section got an 6/12/24/48db lowpass filter and the modulation section a random/noise module.
As for now, it's time to start thinking about making the system more experimental/random orientated, more like a sound processing tool or more like a casual monosynth?