Thanks for the reply Wesociety. I replaced my 420N just because I came upon this site and read up on the 2500A. I am having NO problems whatsoever with that drive. The problems that I am having is with the Mat"shit"a DVD/CDRW that is in my IBM T30 laptop. I've also noticed that drive, in the Nero CD-DVD speed tests, starts out @ 3.5 with a DVD+R. With a DVD-R, it starts @ 1.05. I even have an extra SR-8176 Matshita DVD-ROM, that I exchanged to see if it would do the same things. Did exactly the same thing. It rips -R's slower than +R's. The 420N is still going strong and does not have these problems of a slower burn in the enclosure kit or internally. I upgraded my chipset and the motherboard is already updated. I'm getting great burns off the hdd, 7.5. So if all fails, then I guess that I'll have to live with that. Now back to my studying.