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I figured there would be something like this. But the physics of the set up leave me wondering what happens if it starts to sway erratically, would the fact that there is no weight to speak of at the 5th wheel hitch point make recovery harder since it looks like the second hitch point might exacerbate the sway? Normally sway will swing the towing vehicle rear back and forth a bit but the weight of the entire vehicle will generally prevent the wheels from actually sliding. In this case you have a lot less weight at either hitch point and it looks more likely to jackknife. I have never researched this set up and only experience was helping to reconnect a semi towing tandems years ago.There's an actual product that is like that, but appears to be engineered and built a bit better...
The Automated Safety Hitch:
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