This setup works witha series Digifant (MV,SS) ECU, but not with a Digijet (DJ)-ECU. Here more adjustments have to be made.
…plug and play…
This plug and play solution for the power increase of a WBX. A free programmable ECU, which gets the best power possible from your WBX engine.
The throttle potentiometer is not necessary and the ECU would also work in other cars with a serial Digifant.
…as a bluetooth version
Drosselklappenteil WBX, modifiziert 
passendes Adapterkabel
A modified throttle with potentiometer is used as an inupt parameter to measure the load condition. The fitting adaptor cable is used between the air flow meter cable and the potentiometer. So the air flow meter is not used any more. The intake air temperature sensor is not touched in this modification.