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I used to run, then tool, fixture, and supervise a few CNC machines, tolerances are easy to keep within .003" on the lowest quality "high end" machine ESPECIALLY if you're making parts from billet. Cast is a whole other story.
If you're making thousands, okay, a few bad parts might slip through, but that's why you have quality sampling. And they should have caught all these problems in the initial prototype before they went and made a huge run of $3000 CTWs
They have to have quality control on their production lines, so it's a pretty massive blunder if an out-of-spec gearbox made it into a finished product...
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