>>3706840>Or they have found that a heatsink has minimal advantage over not a heatsink.I think this might have a been a factor. The chinese dude posted a picture of him measuring 47C on the outside of the camera after he applied his diy fix.
I wouldn't be surprised if they did try some other way of heat dissipation (without adding more bulk) but quickly discovered that it made the camera uncomfortably hot to hold while only adding a few minutes of record time.