I agree. They are pricey. I bought mine a while back and they are now on the second rig.
We still put our blocks underneath them.
They probably prevent the rig from sliding a little bit on pavement. Really didn't notice any big improvement as far as stability.
I do agree with what was stated earlier, " if you spend that kind of money you better like them."
If I had to do it all over again I probably wouldn't spend that kind of money on them.
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