One of the complaints about the first-generation PowerBook G4 is that the rubber feet easily wear down/tear off leaving the owner with a very hot machine that sits directly on the table. Not good for the table, not good for the machine. Here’s a HOW TO on replacing them, cheaply… Link.
Editor at large - Make magazine. Creative director - Adafruit Industries, contributing editor - Popular Science. Previously: Founded - Hack-a-Day, how-to editor - Engadget, Director of product development - Fallon Worldwide, Technology Director - Braincraft.
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Apple offers original feet from their support website:
http://www.apple.com/support/powerbook/doityourself/15al/
Call 1-800-APL-CARE.