The Spa Valley Trust had their Cessna O-1G ZK-FYA (c/n 22737).
I assume they are "Willie Pete" rockets underwing.
It served with the SVnAF during that crazy Asian war.
ZK-OST is the Peter Karl Avid Heavy Hauler UL and carries the c/n 1543E.
The Titan T51 ZK-WSV, with its abbreviated c/n of 95 sat in the visitors park for several days. It is Peter Walton's from Manuakau. As you can see below - it carries the "Miss B'havin" name and this scantily clad damsel.