Just wanted to mention that I’ve now also created a CAT rig and updated the first post with a new link that has both rigs in there.
The CAT rig works the same way, as far as exporting and all that goes. It’s of course much better aligned to the Hero_TPP skeleton since CAT is very easy to configure, compared to Biped. I’ve set it up with the twist bones included, even though the blue man does not use them, they are in the original skeleton, so I did also set that up. So if you happen to skin a custom character to it, it will work. I didn’t mention it before, but the Biped also is set up with twist bones. And of course the CAT rig is also set up for root motion, just like the Biped rig.
They both accomplish the same job, animating the default Hero_TPP skeleton, though in their own unique ways.