Did you get the idea from Mark Steck, "Dry Land coon trapping" video. I seen apart in the movie where he uses something like what you have to pull the stakes.
I made one kind of like the one you have. I had one of our engineers and our tool room guys at work modify it and build it. (We got to keep these guys sharp, since the auto industry is slow we have to keep these professionals thinking. LOL)
The one I have is actually a Puller/ Driver. Based on the slidehammer design mechinacs use.
Running and Gunning at break-neck speeds. Because we would rather crash and burn in a marsh, than live a dull existance on this earth.