I wanted to update the thread with a status report. The narrowband-shifting device manufacturer continues to make progress. Below is a photo of the device, with a generic connector to which a model-specific (R1100, R1150, R1200, F800) cable harness with OEM connectors gets attached. The installation procedure will be: plug in the OEM connectors (and connect a ground wire in some cases). Inside the "black box" is a small data acquistion and digital processor that intercepts the stock signal and sends a modified version to the Motronic. There should be a production version with a small first run in about a month. This probably seems like a slow process but the manufacturer is handling this in a professional manner which takes time.