Is it possible to flash back to original firmware?

OK check this out. I got this Sony DW-D18A drive and I flashed it to the Lite On SOHW-832S. I was wondering, is it possible to flash the drive back to the original D18A firmware?

Yes, of course it is. If you made a backup of your original firmware, then flash it back onto your drive using LtnFW in Windows or mtkflash in DOS. If you don’t make a backup, then download a copy from my site.