sky dragon works so the argus should work if they have the same equipment to fly it up to the strat long ways up. I thought that was an interesting article.
TAO has been doing equipment testing for the skydragon, booster technology, optimized isolation etc.
They have not sent the skydragon to the stratosphere, they are working on components and testing them separately. But they are working on it nonetheless.
The race to the stratosphere has already been won by Titan Aerospace