In the 1980s, Carline oversaw Labour Department scheme workers who were often in trouble with the law, or unemployable.
"In those days we had what they'd call PEP gangs. I had about 26 jokers. They used to do six months. Then they had a change of government and they squashed all that."
Carline said many workers were now successful, and kept in touch with the Glenbrook enthusiasts. It was tough, character-building work for the PP gangs and volunteers who worked beside them. Carline and his good friend and mentor Ted Pointon, at right of picture, were given the honour of tightening the bolts in preparation for the new line's opening on December 6.
"They've got a big screw spike that goes down. We were doing it [by hand]. Normally, you do it with a compressed air gun."
Pointon died in January 2004. Carline, a builder originally from Northcote, said Pointon taught him everything he could about engineering. Now, Carline is the expert - though he'd never admit as much - rebuilding carriages and locomotives from the heyday of New Zealand rail.
He spends much of his time in a workshop near the big open roads and rolling fields around Glenbrook.
"I love it out here. I know all the neighbours. I know everyone downtown. I hate going up to Auckland."
The society hopes to make more of the countryside accessible by train, and an extension to Waiuku is in the works.