The outside of the plug was oxidised and rusting.
So yeah the coilpacks could not have been secured as well as they could have.
In Canberra I'd leave the valley cover on to stop water pooling at the base of the coilpack/plug too (like an umbrella).
Seriously removing them to stop heat build up and destroying your coilpacks - I call myth. Race cars and regular racing - yeh aite...
The gap and colour of all the plugs looked good really (from a tuning aspect). Although I wasn't there when you pulled number 1 out to fine oil/fuel (wet)
Ive seen brown, white, black, grey, oily and corroded plugs. and yours actually looked better than most. So what ever the tune and A/F ratio it's