Thanks for all the info regarding "superdrives" By the way, I'm selling the DVD-ROM drive (internal) that I replaced with the DVR-108. For sale is the original drive from my G4: a 6x DVD-ROM "manufactured to Apple Computer specifications", though I believe it is a Panasonic mechanism. Model SR-8585-B. Never had a problem with it, works fine. I'm asking $20.00 + whatever it costs to ship to your zip code (I'm guessing in the $5.00 range). If no one on the List is interested it will head to eBay. Gary