When converting a garden shed back into a tram there are a few unusual challenges. One major one is, if you want the tram to move, you need running gear. Unfortunately Auckland did very well at scrapping all but three of its trams, and the entire Brush A Class cars were all scrapped in 1931. In fact, no examples of the running equipment required to rebuild a dinghy has survived anywhere in the world.
There is only one solution, find the original AET drawings and reconstruct the missing components from scratch. Hunting around in archives has afforded a wealth of component drawings from the Auckland system, the only problem is knowing how they go together.