I do have the Hendrix axles (the full package) and I did not say they don't work. They do. They just are not the miracle fix everyone was hoping for. For that matter, I fully doubt there is a 100% fix to be had (unless you install a live axle).
I was just hoping they would cure the hop on light take-offs. They don't. But if it is a burnout you desire, these axles do deliver. My rudimentary engineering knowledge tells me that for the unequal diameters to have an effect, there has to be sufficient load on the axles. Without sufficient load, these axles really do not do anything different than the stock axles do. And why would they? Aside from the 1/8" diameter difference, they are pretty much identical.
Having said all that, I don't really regret installing them. One situation where I am fully satisfied is throttle oversteer. I know some of you guys didn't have an axle tramp issue during oversteer, but my car, for whatever reason did. These axles have cured that problem.
As for evidence of a successful, tramp-free burnout, I offer this:
disclaimer: I neither admit to, nor do I condone this behavior