You are right Petspeed, the difference between both cd-recorders is minimal; they probably use the same chipset.

In order to know what models can write sd3 these are the requeriments:

-For plex 8/20 any of them of March 99 or after, because previous models can not write in raw mode as said Petspeed.

-For plex 8/2/20 the search is limitated; you will have to find tlas #01xx ONLY!!; the date of manufacturate of those models is irrelevant. Other tlas can write in raw mode but the chipset is simply different and can not write SD 2.x/sd3.x

Good luck