By the way when you did this to the MacBook, did your Libreboot include this?
(Quoted from Libreboot website at
https://libreboot.org/docs/hcl/#macbook21):
"The system does get a bit hotter compared to when running the original
firmware. It is certainly hotter than an X60/T60. The heat issues have been
partially fixed by the following patch (now merged in libreboot):
http://review.coreboot.org/#/c/7923/.";
Supposedly with this patch to Coreboot (which has now come downstream to
Libreboot) the maximum temperature is 50 celcius.
