How to choose thermopads - thickness, compressibility, flexibility?

I have a problem with thermocouples and more specifically with their selection.

The original ones were blue, gray, etc. - about 1mm before squeezing.
They were extra soft - they had to fit in the first assembly during the first assembly.

I bought a thermocouple from AAB 6W / mK - black with a thickness of 1mm on the famous portal
They seemed hard at the beginning, but the therapist's opinions were positive and supposedly have good properties when it comes to compressibility.

The button is true!
I would probably have to screw the piece of metal with 5 screws to squeeze in!
In my laptop, the processor, graphics and bridge are cooled on a shared heat sink.
When I set up these thermocouples, it was sort of weird to me - I thought it was normal ...
Something touched me to re-spin the cooling system.
And what - the processor did not adhere to the radiator and the thermocouples did not compress at all.
Some hard ones are compared to the original ones.

I wonder how people choose copper blades and thermocouples.
How do you measure the gaps that are between the heat sink and the system?
Once in a magical way, I will measure what thermocouple to choose and which company to elegantly squeeze and match and not stand out.

Daniel_GSM wrote:

How do you measure the gaps that are between the heat sink and the system?
I will make a measurement in some magical way

And magical there - you use the device called "feeler gauge" for this purpose - this is how it looks:
https://pl.wikipedia.org/wiki/Szczelinomierz
And you can buy it at allie auction No. 5167019692 - this should be enough to measure the thickness of the needed thermocouple.

Haha - this is how a feeler gauge - it's so simple.
Worse with the approach - but since the others are doing it myself.

And what if the gap will be 0.8mm - there are such thermocouples?
Then use 1mm - right? I hope that these 0.2mm will be lost under pressure because otherwise the heat sink will not sit on the sling.

And as for the original - well, it mounts DELL, HP and ASUS - because I have such laptops in the workshop

I understand that you are buying on a popular portal?
I was looking for example in TME because I often order there, but they do not have something like that
They have only 1mm with conductivity at the level of 2.4W / mk

Well, thank you so far.
We will see how the gauge measurement will go to me because it seems to me that access will be poor.