If CFExpress card is a problem... erm, use an SD! 4K HQ and 8K all yours to enjoy with an SD card! If the external temp gets a bit uncomfortable a cage would help. Aluminium would spread and disperse the heat and allow it to more or less go away, it acts as a radiator. In my opinion, until I see evidence, this low temperature burn PR line is simply more half-truths from Canon to cover up the cripple hammer You only have to look at the kind of site they chose to voice the boll