I agree, but heat dissipation is done as a 'radiated heat', as coming off from a rather hard run with the tourer, even my chassis gets warm, but it isn't acting as a heatsink, it is just picking up the heat from the motor radiating heat outwards, thats why I am not a great fan of, erm, fans.
The issue with mounting it on the end bell is that there isn't much metal there, you will get a small reduction, but not nearly as much as a liquid jacket round the can, just think about your Car engine, if you just put a cooling jacket on the front or side or bottom of the engine, it is far less effective than a cooling jacket that a modern engine has.
Thermal Paste, tell you what, go pop the air cooler off your CPU, clean the thermal paste away, put the cooler back on, then run a diagnostic with the comp running, then put fresh paste on and check again, you will find a significant difference.
I am not deniying that this is a clever design, just don't think the implementation is done correctly.
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