The N Gauge Graham Farish Class 350 Desiro EMU...
The MX649N sound decoder is a 6pin direct plugin sound decoder, but is marginally too long for the Farish model, so the easiest approach is to remove the 6pin DCC socket
from the model and solder the pins of the decoder directly to the model's circuit board. A minor cut of the seating compartment makes room easily for a SugarCube9.
The non-motorised end cars are easily fitted with Zimo MX681N 6pin direct plugin function-only decoders, providing control of the direction head/tail lighting.