far as i can tell, they don't actually dissolve MORE heat . . they just dissolve heat in another way . .
no more ammo explosion from overheating, but overheating still happens and you shut down.
and they dissipate just as much as clan double heat sinks and take up as much space/tonnage i think.
i don't actually know what the CBT Rules say about those things. . but they make you glow!
that's gotta be worth something!