Here are a few videos I made of the dozer and scraper that I built a couple of years ago. This one shows a little of the detail.
http://www.youtube.com/watch?v=qlW01...eature=related
This one shows the capability of the dozer.
http://www.youtube.com/watch?v=5M4GW...eature=related
This one is of the dozer and scraper combo.
http://www.youtube.com/watch?v=TIs3v...eature=related