The clunk line is unbelievable, as stiff as a board! The bung appears to be the wrong colour and has gone solid. Thankfully, the carb appears to be clear and ok. I've ordered a new clunk line that apparently will not harden, and a new bung. I will replace all fuel lines.
Other issues include the plastic control surface clevices become brittle and breaking - they are all being replaced.
The batteries have both taken a full charge and are showing great voltage! That's a shocker!