I have two weight distribution units and use them on my 7K & 14K equipment trailers. I also have a 10K Load Trail dump trailer but it has a large box on the tongue and with the battery & hydraulic pump it makes it impossible to use the weight distribution unit. I have loaded this trailer to its maximum with gravel or wood 100's of times and never had a problem with tongue weight or swaying. The trailer weighs around 4,000 lbs itself so with my truck I am close to the 5,000 load limit without a WD unit even without much of a load. With the weight distribution unit my limit is 12,500 lbs. However, I would like to use the WD unit to be legally ok. I talked with the dealer where I bought the trailer and he agrees a WD unit would not work without moving the box. If anyone uses a dump trailer with a weight distribution unit it would be nice to see a picture. All I see so far are WD units on equipment trailers but not sure it is that easy to hook up on many dump trailers with the box on the front tongue.