Bro, I owe you one!! My heat gun can only do 60 or 600C so I thought what the hell, if my PS3 is gonna die it may as well go out in style. One fire alarm set off and a few concentrated blasts of ye olde heat gun later and...We're back in business!!

I shielded myself with my dressing gown before powering it on just in case but waddayaknow...It just works.
If this also stops my PS3 fan from going from level 1 to 5 after 10 minutes I'll be very happy indeed!
Downloading the FoC demo now thanks to you. Cheers bud!