Does anyone know of a forum where this is being discussed? I am operating a 2018 vintage Marklin Rheingold set with the DCC setting on my z21. It works fine for running the train but I am nervous to use it to change CV's. It was very difficult to change the loc address (away from 3) with lots of error and could not read messages and impossible to change the baggage car address (stuck at 3). For a while I thought I had lost the loco completely. There is a Motorola setting on the z21 but I am not sure that means Marklin mfx. I would also like to change some of the function addresses on the loco (z21 only supports 0-28 and Marklin has the cool station announcements on 29-31). So advice or a link to an appropriate site would be much appreciated.

Got it, thanks