Homebrew PCBs

Hello,

I need to get a bit more heat out of this GBC Creative Laminator.  Very close but probably another 10-20C would be what I need (ability to adjust would be EXCELLENT). How do I go about accomplishing my goal.  Has the Daewoo KSD602 thermostat - http://www.daewood.com.hk/en/productdetail.asp?id=122&sortid=210&pid=.

http://www.bnkz.com/GBC/Laminator001.jpg

http://www.bnkz.com/GBC/Laminator002.jpg

http://www.bnkz.com/GBC/Laminator003.jpg

http://www.bnkz.com/GBC/Laminator004.jpg

http://www.bnkz.com/GBC/Laminator005.jpg

Any assistance would be greatly appreciated.  I did not remove the power board area but have no problems going into that area - I am so close, I just feel the toner is not being 'baked' onto the copper clad quite enough to stand up to the time in the muriatic acid / H2O2 w/ the bubbler and small, important pieces are coming off.  Doing .5mm pitch smd work.

Thanks in advance,
Bob