That is exactly what I am wondering - if they are (which the 782D in the picture shows), I think it would be cool to have one. I have never seen any on the web except for the pictures just posted - they have all been 1 furrow plows. I was really thinking if you could get the traction with duals on both sides, you could likely pull a 3 or 4 furrow "on land" plow. The articulating tractor that is on extreme motor works site, with the duals all the way around should be able to. Throw some ags on it instead of turfs, hook up a 4 furrow on land plow and you would be away to the races! Imagine showing up at a plow day with that unit, there would be a lot of heads turning and head scratching over it!