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I was taught that it's the ratio between the TV axle/hitch and hitch/trailer axle. Moving the hitch closer to the tow vehicle axle is [proportionally] equivalent to lengthening the tongue.
slowmover can tell you about a swinging hitch that does something similar. I don't recall the brand name or how it locks (or not).
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.Without freedom of speech we wouldn't know who all the idiots are. -- anonymous poster
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.Three conspiracy theorists walk into a bar --You can't say that is a coincidence.
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