Thirty years ago Montana released for the very first time a wine not many people had heard of back in 1979 Marlborough sauvignon blanc.
What a Cinderella story it has been - last year, New Zealand produced 170,000 tones of sauvignon blanc.
That's a huge figure, and 90% of it, 150,000 tonnes, came from Marlborough.
From zero to 150,000 tonnes in 30 years this is big, big business now - wine exports earned the country $1.25 billion last year.
And more than half of that comes from the vines a few square kilometres.
Campbell live celebrates Marlborough sauvignon blanc, which has even done what the All Blacks couldn't, and beaten France in Britain.
They also look at how some producers say they have grown too much, too fast, and arguably with too little control - and now may they have to dump some.
Yes - dump some. Really.