Look on my website [http://www.fackrell.me.uk/index.html) for a DIY fix to the TC overheating. It is a design flaw, where the internal fan has three really very fundamental faults...
1. No air-inlet hole,
2. It points the wrong way,
3. It is not turned on.
Usually the heat will kill the PSU, and that has a downloadable PDF to help with its fix. The fan can be modified and the case can be drilled, etc.
Regards,
Chris Fackrell
YORK, UK.