For those wishing to fit a decoder in the new Hornby Terrier, the Zimo MX617F (wires with NEM651 plug) will just fit without having to resort to any surgery whatsoever.    I initially thought the 70mm long wires would be problematic, however, they can be gently folded to rest atop the decoder socket and held with a small strip of tape whilst the body is refitted.   WARNING! Use thin, pointed tweezers to gently prise the sandpipes over the brake gear when aligning and refittin