You could checkout the devices Deft Audio builds and sells: Teensy 3.2 MIDI Breakout board, 3in / 3out, USB from Deftaudio on Tindie. Pretty cheap and fully programmable (teensy) Nice thing is that he has example firmwares available. I used the 8 in 8 outbox from Deft audio and programmed it myself with the use of his example sketches.
Wilba Front
Front: 2 midi in / 2 midi uit
Back: 2 midi in / 6 midi uit
OSC
Including build-in 230V psu
Fits perfect in the desk I built (which is also for sale), but can be transformed to its original case.
Why? I started playing guitar and I came to the conclusion that the guitar fits me more (played more guitar in a half year than synths in 5 years...)
More info: Zolderverkoop | KC's Hobbyprojecten (vanhoekelen.nl) (Dutch)
Also for sale: Mutable Instruments Ambika, Mutable Instruments Shruthi, PreenFM.
Thanks Thomas, but I already found that page. As @antichambre stated, I only want to use interrnal characters. There must be a simple way to achieve this I hoped (without having to us 2 character postions like ->).
Cheers
Kees