Thx for the feedback -- good to hear that the script works. But the 'magic' happens somewhere else: Repairing the moronic overvolted dvfs table Xunlong delivered that is used unfortunately also by loboris in his OS images.
If you repair the dvfs table (this is all the script does) then you won't need a heatsink at all:
http://linux-sunxi.org/User_talk:Tkaiser#Tests_without_a_heatsink
It's just the crazy overvolting (that's only needed to advertise the H3 based Orange Pi falsely as "being able to run up to 1.6Ghz") that's responsible for the heat problems Orange Pi users believe they have to suffer from.