This article has almost nothing about the actual motor in the title except this:

"every component from previous motors was examined and optimized to lighten this motor and improve efficiency. The end-shield for the motor, for example, was analyzed using a software package that divided the component into over 100,000 elements, each of which was individually further stress-analyzed and subject to iterative improvement loops. Eventually, the custom software spat out a filigree structure that weighs 4.9kg instead of the 10.5kg from the previous design."

The rest of the article is basically fluff with no info.