I am a big fan of Dexter products but have bad news to share regarding the Dexter EZ-Flex equalizer.
Back in late '07 early '08, when my HH fiver was only a few months old old, I discovered that NuWa was installing or making optionally available, the Dexter EZ-Flex system on the '08 model fivers. I wanted them on my HH so when I was in Chanute I talked to the service department shop foreman and he told me to take it down the street to Young's Welding, the company that builds their frames.
I took it to Young's and had them installed. Price for the parts and labor was very reasonable and I was happy. A year or so later I was in Chanute again and complained of an electric brake on my trailer that was slow to release each time I used the brakes. Again, I was sent down to Young's Welding. The same guy looked it over and told me to leave it a few hours and he would fix it.
When I returned about three hours later he had fixed the brake but he explained that he found that the gap between tires on the left/street side of the trailer had closed up to a margin too small because my Dexter EZ-Flez equalizers had already worn out the bushings and was sagging, allowing the distance between axles to narrow. He said they had been finding that on a lot of the ones they had installed on new frames. He said Dexter had made a mistake on the design of those products and they were not strong enough for the rated weight and he was replacing them. To my disappointment, Youngs had changed over to a similar product made by Lippert. I wasn't pleased and told him so but he explained that was all he had to install. And he had installed them on my trailer at no charge to me.
So, I'm still a big fan of Dexter products in general and no fan at all of Lippert products but that is the rest of the story.
On the other hand, I ordered the 7,000 lb. Dexter axle assemblies and large drum brakes for my trailer. The big brakes work as well as hydraulic disc brakes on my trailer and are self adjusting in the forward direction. Every time I apply the brakes when towing, the brakes adjust themselves as needed.
Grizzly, many, perhaps most new trailers come with marginal or inadequate axles and suspension under them from the factory. I've seen many a fifth wheel being pulled down the highway with the wheels canted inward at the top and outward at the bottom, an indication of bent spindles. That was the reason I ordered my trailer with 7,000 axles and springs instead of the standard 6,000#.