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I would recommend against using Arctic Silver on the PowerBook due to the long curing process. Arctic Cooling MX-4 does just as well without the need to cure, and also lasts longer. I've been using that on old PowerBook maintenance re-applications and it does very well.
You're welcome! I was the one who added the spudger tips, as I had a devil of a time making the DVD drive clips snap back into place without one when I followed this guide.