Hi, Of course being the mac newbie, I am picking up so much new and exciting info from everyone here. So please don't bash me, because this may be an old topic, I just did a searched and did not find that much recent information: I've been reading up on Cynikal's Superdrive Firmware Upgrade (thanks Cynikal, by the way) that doubles the burn speed: 16x CDR, 2x DVD, and adds DVDRW. This sound like a must-have!! I was wondering how many of you 17" 1ghz owners have or had this upgrade. My questions are: Were there any problems associated with the upgrade? Any issues with heat? (If there is, could I just lower the burn speeds to the original settings, would that eliminate any potential heat issues?) A major concern is the warranty (apple care) that I have. I think without the downgrade path, this would be a huge issue, but since there is a downgrade path, I feel a little more secure. Has anyone had warranty issues with it? Do you just downgrade before you send it in, and then there shouldn't be an issue? Does the downgrade work properly? I apologize for the questions and concerns. This would be an invaluable upgrade to have, but since I'm still learning I just want to know what to expect. Thanks so much!!