I never would have believed anybody is still making these: http://www.winginsl.com/data75/ Scroll down for some very interesting pictures: http://www.transport-links.org/transport_links/filearea/publications/1_491_PA1253_1991.pdf
Yair . . . Buetop Man There are several manufacturers over here. http://www.hoopersengineering.com/catalogue/graders-tractor-drawn-pull-type-tow-type I have seen a farm built version with a thirty by six foot blade that would stop an 8H. They can move a lot of dirt for not a lot of money and bugger all to go wrong. Cheers.
in africa, simple and cheap machine always welcomed.