Thoughts on Torqueworm limited slip?

[highfructose]

It appears there are two truetrac (trutrac) style helical limited slip Torsen rear differentials for the 200 series.

Does anyone have any thoughts on the speedmaster torqueworm?

Toyota LandCruiser 100 Series TorqueWorm Helical Gear Limited Slip Differential - https://www.speedmaster79.com/TOYOTA-LandCruiser-100-Series-TorqueWorm-Helical-Gear-Limited-Slip-Differential