Thanks for the comment! It is very much needed maintenance. Nothing exciting really, as mentioned in the first post haha
I did a coolant flush and it was really, really bad.
I used a filler gauge to get the absolute correct size for the lower radiator plug. Metal on plastic has always been a nightmare for me. It's 10 year old plastic that has seen a lot of heat.... not a great idea to use a lot of torque on it.
Nasty fluid. I'm pretty sure it hasn't been changed since new.