I think the device has merit and maybe some of the OEMs will add it to their loong TTs that are designed to be 1/2 ton towable.
Peeps, you really don't give a rat$ a$$ about anybody else but yourself do ya? Sooo, you design and build trailers where most of the load is user-placed, like in a car trailer. And so this device is useless because you don't have a use for it.
In the TT world, users only have control over a small % of the total weight of the TT, most of the weight is added at the factory. Unfortunately you really don't know how a TT will tow until you tow it. Look at the accidents that get reported on here regularly from newbie RVers that have never towed, don't know about weight/balance, and probably have a TV that's marginal for the job. I think those folks would greatly appreciate a device like this, in fact if all TT mfrs added this as OEM it probably would put Hensley and ProPride out of business.
Hats off to you for being a superior trailer designer, trailer builder, and trailer tower. Now look at the real world.