I went through the box of old dvd-rw units i still have and found this 20a1p. It was the second dvd-rw i have bought (the first was a LG H55L which did not want to write to any dual layer disc). I have tested it and apart the sticky tray i have noticed that all cd's i burn only burn at 16x, regardless of the speed i choose. Dvd's burn fine. I have dissasembled and cleaned it, but the problem remains. Is this a weak laser symptom?