Update on the Dreadnaught diff brace:
It fits perfectly and in combination with the Turbine Tech mount the diff is now very secure and hopefully broken axles are a thing of the past. If you're considering this mod I should warn that the polyurethane transmits a bit of noise from the diff into the car body.
And here's an interesting observation, I now notice the diff howl that some people report, however the noise is not speed dependent like a regular diff noise, it's load dependent and it matches the diff solenoid voltage patterns that I observed when I was monitoring them. Which leads me to suspect the diff whine is actually the result of a harmonic caused by the high-frequency activation of the clutch pack rather than the mechanical interaction of the pinion and ring gear. It really howls when I give it a bit and sounds like a dog box, I quite like it.