I agree with the other guys about the battery or alternator. Check your charge rate an do a load test on the battery. Also see if your battery terminals are tight.
Just thought it was funny as i work in a dealership with both ford and proton. normally all the ford guys hang shit on the protons all day. Was good to see it the other way round for once. Falcon diffs are crap anyway.
Sounds like a good day, will try to make it if possible.
Leetom - Will bring the LHS weathersheild.
Hope to see you guys out there, will have to clean the old girl up.