Just had the local Farm and Ranch show here in Edmonton. One of the companies represented had a very interesting product. I'm sure there are variations of it available on the market, but I thought I would point you to the specs for interest sake. They had a video running at their booth and are running demos at various farms/acreages in the area. It has a unique design that causes the gravel or dirt to weigh down the scraper as you grade. Their statement is that "unlike a boxblade that as it fills tries to ride up". Now I haven't used a box blade, but I guess in theory that may be true. In any event here is the link to the company. I do want to see a "live" demo though. Oh ya....and they aren't exactly cheap!!!

http://conterraindustries.com/

Kevin