How to convert N Gauge Union Mills Class B12 (Original) to DCC

This guide covers the following models:

• Union Mills Class B12 61572 in BR Black

Union Mills models follow a similar tender drive arrangement. It is usually possible to fit a small decoder inside the tender, however where this is not possible, the decoder can be hidden in the cab. It is technically possible to mill out some of the metal from the tender to create space, however this reduces weight and traction.

Refer to the Union Mills J39 (old chassis) guide for the detailed step-by-step guide on installing a decoder in the cab, there isn't enough room inside the tender on this model.