Hmmm interesting idea

bobndot wrote:
I have a Sherline TW scale (that sits under the trailers coupler ball mount) and used it when initially setting up my rig. Now that have a good idea of my various TW's when i pack things different ways, i really do not need to use a scale every time i hitch up.

Here is the real truth of the matter. Tongue scales are really nice for the initial set up of a trailer. But once set up, how often are they needed. You spend over a hundred dollars for a one time use and then, basically, never used again. It might be OK if you have a fleet of trucks and various sizes of trailers, moving equipment and loads. You may need to check the weights every time you hitch up, for insurance purposes, or whatever. But for the average "Joe Civilian", it might be less expensive and make more sense to rent one, or borrower one from someone who already has a tongue scale.

Still, the idea is novel for the ball mounted scale. I would think it would be attached permanently to a shaft, and then just insert the shaft into the receiver hitch rather than attempting to remove the ball and attaching this one on your primary shank.