Hi rachel, sorry for the OT, but in the description for the TT it says...
"Stainless steel bearing is outsource machined by a company who solely caters the Chinese Aerospace industry, which just recently sent astronants walk in the space, to achieve watch grade precision ( ? 0.1mm ) and finish."
I'd hate to think Chinese Aerospace considers +- .1mm to be "close enough".
This value needs another decimal place to achieve domestic aerospace tolerances.
Typo perhaps?