Great idea, and way beyond cool that you took the time to post the pictorial of the jack in action.
Does anyone recall Beemings set-up? He had some up with a come-a-long type setup and some type of anchor to screw in to fasten it to. He had fabricated a mount that went behind the license plate area. I've carried a screw-in ground anchor before, along with ratchet straps, but never had to use them.
The ingenuity and talent that is so often displayed in this forum is pretty amazing.