Back around 2002 I made a soil slicer for my PT425. It was just a plow share from TSC. I got the longest one I could find. I push it all the time. It is 12" long but can only go about 10"deep due to the FEL arms won't go any lower.
In our sandy soil, I can do it in one pass. In the hard packed ball park diamonds that I was rehabbing, I could sometimes only go an inch or two at a time.
By pushing it, I could trace over my previous path exactly as I can see it from the operator's seat.
I have snapped those bolts a few times. I figure it is like a shear pin. If I snap the bolts, I was pushing too hard.
The last project I did with it I pulled a water line from my garden to my house. I had to make an S shaped path to go around some fruit trees. Our soil is mostly sand, so I did it on one pass. Then I went back and tied a rope through the bottom hole on the plow share and retraced the first slice while I pulled in a 100 foot section of plastic pipe that was tied to the rope. I was really surprised at how little friction was in the soil, as after I was done, out of curiosity, I pulled on the plastic pipe with my hand and I was able to pull the whole 100' section in a curved path by hand with ease.
Anyhow, I would be surprised if the larger units couldn't do the same thing with a much larger plow share.