hi, i have a sonyrb50 that is about 3 months old and came with a sony q28a writer, which i understand is the same as the lite-on 1693s and the sony dru-800. i have now tried most of the different firmware that is available for these 3 drives and in the process i have found that my burn quality seems to be getting worse. I was hoping somebody may know what firmware works best with this drive, as a sony q28a i have tried kys1, kys2, and kys4. as a lite-on 1693s i have tried ksob, kc4b. as a sony dru 800a i have tried ky06. i think the kys4 worked slightly better than the other ones but now when i use it i have not been able to get the same burn quality that i once was getting. i don't know if all of the firmware flashing that i have done has caused this to happen. i am using only verbatim +r 16x. i used to consistently get a 95 quality score with kys4 at 16x burn speed and 12x burn speed, now i am lucky to get 1 out of 5 that is in the 90's. my main focus is to get the best quality burns possible with 4.7g +r media and dual layer +r media. i don't care about burn speed as much.