Dexter axel brake up grade

Having a career in nondestructive testing that included everything from the space shuttle to nuclear plants and refineries I have a great deal less faith NHTSA and DOT, ASME etc. as many of the specifications are written by, directly or indirectly by the manufacturers. A very specific example of concern to us, ST trailer tires are not tested to the same standards as truck or passenger car tires, I looked at the testing standards for both. As a result they fail at a much higher rate often catastrophically.
I can site many personal examples where manufacturers are give a plus or minus tolerance per ASTM, and you can guess that 90+% of the time they will ground the ~10% under.
Some one I know from the Teardrop & Tiny Travel Trailer forum had just completed an Alaska trip and went to a number of the locations we would go to. He indicated that one 7" brake failed completely and that even with a pickup as a TV had not felt comfortable. In most cases teardrop trailers weigh far less than 2,000 Lbs.
I have found that mine is a #9 Dexter, and there does not appear to be any way to upgrade short of replacement. I will before we go replace and adjust as necessary.