Depending on the Libreboot-version - personally I use the 2016-version out of different motivations: You just need to do ...
I had until today no further issues with different systems using this combination (alike ThinkPad X60(s), ThinkPad T60 and ThinkPad X200).
And I'm sure this will be the same for ThinkPad T500 I have in use. But please remember: That's only one personal experience with a different version of Libreboot as I see the project nowadays in a different perspective and no longer following the roots I had chosen it for back those days (but this is for sure a different talk and have no place within this thread).
Human being in favor with clear principles and so also for freedom in soft- and hardware!
Certainly anyone who has the power to make you believe absurdities has the power to make you commit injustices: For a life of every being full with peace and kindness, including diversity and freedom. Capitalism is destroying our minds, the planet itself and the universe in the end!