Got TNT01 over the weekend and did the fix.
The elbows on every piece are incorrectly flipped front-to-back as reported on the Chinese boards:
https://tieba.baidu.com/p/8015565864Fixing it requires knocking out a pin, but these pins are the most stubborn ones I've ever encountered. Might be something to do with the dense plastic. Light tapping wasn't enough to drive the pin at all, neither were strong blows though I don't have the most arm strength. In the end I had to heat up the pieces in hot water followed by a solid whack to drive the pins far out enough. One of the ends is knurled like pins on hastak toys, you want them to exit from this side.