What combine factory is featured on Discovery Channel Factory made episode 7?

When I was watching I didn't catch whether they said at the beginning, or not....I thought at the time it was Hesston but now I don't think so???  Listing says "largest combine factory in the world" but googling that proves fruitless...there are at least three plants which seem to think they are the largest, and none of them are the one on the   show.