The final cache is not at the listed coordinates, you can go there if you wish but will not be of any help to you.
The cache is to be found at :
S 41 1(Petone).(Ngauranga)(Wellington-Wellington)(Waterloo)
E 174 5(Ava).(Epuni)(Woburn - Petone)(Wingate - Epuni)
The cache is a small container with room only for a log book and pencil.
You can check your answers for this puzzle on
This cache will be maintained by a local cacher.