I finally got a stubborn gate post plumb in wet clay using a trick my uncle showed me.
Last month in Springfield, I had a gate post that just would not hold level in this super wet, heavy clay. After trying three times with the normal mix, I remembered my uncle saying to throw a bag of quick-set concrete into the hole first, then pour the regular mix on top. I did that, braced it for a full 24 hours, and it hasn't moved a millimeter since. Has anyone else tried something like this, or do you think it's asking for trouble down the line?