Dapol's Terrier model in O Gauge is their first low-cost model for this scale as is superb, offering a fantastic product for
the price. It is easy to install DCC Sound into, with the provision of a 21pin DCC socket for a Zimo MX644D decoder, and plenty
of room in the boiler for a decent cube speaker, as well as a stay-alive too.
In our example, we have used a YouChoos Brick11 speaker with a SuperCap6800uF for stay-alive. The noise supression board of the
loco had to be removed in order for it to run properly with the Zimo, but otherwise a very simple installation.
NB we would now use an IceCube28X18X11-2W speaker, and use a SuperCap17000uF connected to the MX644 via a SACC16 kit.