Knightrous
"we found a different approach to making stronger CV joints somewhat by accident."
 
To me that sounds like they found another CV cage from another vehicle that happen to fit and is a beefier part. When there discussion started highlighting secondhand parts, I was wondering if they were just cryotreating stock cages.

On that topic, I should've also included this sentence quoted from CRW/Josh:
"our CV joints are OEM parts but not everything in the CV joint can be purchased that exact way except when we make them that way.... not just a off the shelf item by any stretch."
 
The beefier cages might be from another OEM vehicle as you suggested, but maybe the cages alone wouldn't be available off-the-shelf for purchase (from whichever OEM it happens to be). I'm just guessing of course.