After retirement, Smith pursued his lifelong passion of railways and
railway modelling, opening a model and hobby shop in Auckland. Smith had previously written of his interest in model railways in his 1977 book
Little Trains of Thought (Whitcoulls Publishers, Christchurch; co-written with Ches Livingstone), which detailed his creation of a model
HOn30-scale layout based on a fictional New Zealand
West Coast narrow-gauge line. Smith also built the "North Island Main Trunk" layout in
Sn3.5 scale at the
Museum of Transport and Technology in Auckland. Smith was admitted to
Auckland Hospital on 21 September 2018, and died there three days later. ==Honours and awards==