My soil changes from in layers. If I'm in solid red clay, there is never a problem. But if I hit a layer of what I call grey clay, it sucks down the auger the second it hits it. Sometimes I can ride the clutch, rev the engine and get it to power through once it hits bottom and get it out. Every now and then I have to use the wrench to turn it out, or get the backhoe and lift it out with a chain hooked to the loader.
I like the chain on the ROPS idea. I thought about using a post that hung down and rested on the ground when I'm as deep as I want to go, but that idea had too many issues that I don't want to deal with for something that happens one out of fifty times.
Eddie