I've done some of the TDK 4x plus media, mid R01, and they now do 8x with excellent quality, as good or better then my NEC 3500
It also does better quality burns with the Fuji ty02 plus media that's 8x at 16 then it did before this update. My drive is a original 1600 august build drive converted to 1620.
I still need to do some minus media and some of the odd ball crap minus I have to see if it does it OK now. The testing function now seems very good even at 8x and apears to be more consistant then my 811 that sometimes doesn't give the same results twice
Well off to waste more media in the name of science