Toner Transfer + GBC Creative 9 Laminator: GBC Mod Question
I use a GBC Creative 9 laminator with great results and I performed the exact modification you're trying to make! (except I followed these instructions: http://frikkieg.blogspot.com/2009/08/us-pcb-laminator.html)

I just went ahead and swapped out the parts as the tutorial said, and it's worked great. You can see my pcb making method and results here.