Firstly good to read that only a few manageable injuries are the end result.
Now I ask why do they have a carby heat control in such A/C in the first place? For exactly the reason why this craft has now become part of our accident history, for the continious operation of an internal combustion engine under such atmospheric conditions. I was always taught to use carby heat regardless of wx, alt etc.
Still aviation is the best learning ground there is.
CW