What is the manufacturing date of the units with the controller wobble and fan whine fixes?

I've been through 2 faulty units that both had radio static in my left speakers. One preordered from lenovo.com and another purchased new from best buy a month afterwards. They both had a fan whine and the best buy one developed a controller wobble over time.

I would like to buy a third legion go but I'm hoping I can be certain of the fixes Ben mentioned in the Jan 12th update.

How do we know if the unit we receive has those new manufacturing fixes?

Thank you, I love the legion go and all of the hard work you are putting into it to improve it.

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