Experimentation is the answer. I run 4" twisted chisels on my 9 shank Unverferth. The two front ones are 30" apart. If you turn them towards the center, they can actually ball up a wad of tough residue in the right conditions. If you turn them out, they are throwing dirt right on the tires/rims. They will build a big cone of dirt right out on the wheel, then dump it right where you don't want it- like in the road or driveway. The two outboard rear ones are shown turned out. But I turn them in because I don't want to be throwing dirt off the edge of a field onto a lane, into a ditch, etc. But I still get ribbons of sod thown out here and there along grassy edges. To me the biggest issue is trash. The coulters behind the tractor tires are useless as all those tires do a better job of crushing and breaking up stalks, etc. than anything. So the machine ought to be made with all the chopping action concentrated in the middle. Good luck.
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Today's Featured Article - Product Review: JB Weld - by Staff. JB Weld is basically an epoxy glue that does an exceptionally good job of bonding to cast iron and steel along with several other materials. As I mentioned, it is so common that I have yet to buy a tractor that did not have JB Weld used somewhere. It is sometimes used so well you can't tell its there and other times used as a sloppy quick fix. Finding where and how it can be used correctly is key to whether you are using it as an "inelegant hack" or an integral solution to difficult and expens
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