"Only Plextor makes Plextors"
Incorrect. I can name two such CDRW's that use plextor *mechanisms*. The Imation drives from earlier this year (8/4/32 I believe), that were sold at CompUSA, used the plextor innards. Also, the TDK Velowriter CDR uses them as well. Its almost painfully obvious on the TDK, because if you look at the software included with it, it looks the same as Plextor software, except its rebadged for TDK.
Just my .02