Replaced a very puffed battery using this guide, went just fine using adhesive remover.
It was a bit easier than I assumed, but dealing with that glue is far more irritating than I thought it would be too.
I'm sure the new strain gauge trackpads are more durable than the old diving board trackpads (which had a tiny dome switch + fragile plastic/rubber nub making up the physical button, mine failed there), but the strain gauges DO wear out, don't they?
Is it likely to be something that people who press hard will see failing at some point during the Macbooks lifetime?
The thermal pipe contact surface does cover the combined CPU+GPU die completely, so no problem there (though it looks like there's an awful lot of thermal paste on iFixits device...).
The part I think you're looking at (clean with no thermal paste and too far from the thermal pipe contact surface to be covered by it) is the PCH die, which apparently doesn't put off enough heat to matter.
Speculating, if they HAD extended the thermal pipe contact surface to the PCH, it would almost certainly have transferred some of the heat coming off the CPU+GPU die over to the PCH, which in addition to being counterproductive, might be something the PCH can't handle :)
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