Hello taj,
The educypedia has a lot of information on all kinds of electronics subjects:
https://educypedia.org/electronics/electronicaopening.htm
Bertus
Hello,
A flexible coupling will always have slack.
The ones with those plastic or rubber pieces will have more slack than the ones of full metal with a spiral in it.
If you do not want to have any slack, use rigid couplings.
Bertus
Hello,
I have also an older laptop that was not fit for win 11.
I have installed open suse tumbleweed on it.
https://www.opensuse.org/
https://get.opensuse.org/tumbleweed/
Bertus