I actually winced looking at your video of this as you are slamming your finger down hard, particularly near the top of the TP where the surface area is so minimal.
Nah, it's a pretty light force — imagine heavy typing. I'm gaining the audio up loads so you can hear it clearly, which also makes the knock on a hollow metal box loud too.
Plus, as I'm sure you recall, I first noticed the noise by putting the laptop down on my desk after getting it out of the box. The tapping was just to reproduce it for the video.
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I must say that if was working for Apple and I saw your videos, I would not entertain your repeat requests for exchanges.
You must be the person who denied a replacement for this machine of my colleague's. He's currently fighting the fact they'll only let it be repaired, but there are no parts available to actually repair it.
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In terms of the forces of transit, you're really just guessing here.
Yup! That's why I wrote "are likely to be applied".