This DJ MIDI controller was made from wood 10 years ago. At that time it still had a native MIDI output and a self-soldered PCB on a grid board because neither MIDI-over-USB from cheap microcontrollers was possible nor could custom PCB boards be ordered cheaply. Now the PCB design was adapted and printed for an Arduino Micro Pro. At the congress I will try to install the new board, not following the motto "never touch a running system" and upgrade the Bombatuino to a USB-MIDI device.