The reason I came up and took the time to make these plans is quite the story. It all started when I wanted to get a set of train horns for my car, but could not find anything in my price range. And I wondered, could I make my own train horns? So I took the time to do MANY hours of research, and came up with a cheap, but very effective way of making train horns out of PVC. And after making several horns, and seeing all the people that wanted to make them, I decided to put the plans up for download at an affordable price.