Well, it is a prototype… I wish I had more time 
edit: cables are inside, I didn’t found my breadboard…
I’m quite not ready to use this, but anyway - this is just to check it out if it works.
My plan is to make a small wooden box with metal floor (covered with another wood) for weight and four knobs to modulate. But first this… I hope I can make it next week, I’ve got no time, it’s a bummer.