I already patched my drive with a hacked firmware so I cannot patch to 2.18 because I would need to have 2.16. I didn't save it. What should I do?
you can find also 2.16 firmwares from the top message 3500 official firmwares http://www.cdrinfo.com/forum/fb.asp?m=80064
they are under the attachments-link
I also succesfully flashed over 2.F9, with a third party flasher from http://binflash.cdfreaks.com/
(win32 gui version) just selected the K350GN8M.exe with that binflash, and it flashed just ok over the 2.F9
But the 2.16 firmwares are available from here, if you prefer flashing first to the old and then to the new.