Roco/Fleischmann (both owned by Austria-based Modelleisenbahn GmbH) introduced z21 (white) and Z21 (black) digital control sets back around 2013/14 (I think). I received my first z21 digital starter set for my birthday in 2014. Back then, both white (basic) and black (advanced) versions already supported Motorola decoders (found in Märklin H0 models). At that time, I was modeling in N-scale on DCC. I still do N-scale but interested to run Märklin H0-scale layout in the future. Therefore, I could use z21 control center for both DCC and Märklin Digital. This post explains how I did it. I will use the … Continue reading Review: Running Märklin AC Model with Roco/Fleischmann z21 Digital Control Center