It doesnt have to hold it for long. These guys seem to have the resources to replace them when needed.
This, and a combination of the DQ250 in a less stressful 500kg car.
As opposed to our 1600kg.
If you go to their Facebook page and use Google translate, they talk about it.
If Google translate also serves me correctly, there is a comment by the team of preferring it over the DQ500.
Search around and you'll see the limit of the DQ250. Teeth have been broken at around 700nM in 1600kg.
Others are surviving higher.
Most powerful Golf R in the world (DQ250) limits his to 690nM with no problems to date.