I deciced that I couldn't wait and replaced the old drive with an ASUS.
When taking a look at the label I noticed it is even more ancient than I thought,
looks like I cross flashed it from WS10LS30 already and then forgot about it
Hmm, I searched the LG support pages - there is a firmware update to 1.03 available, which might make the drive similar to conrailguy's drive above in terms of firmware version and age.
I also own a WH12LS39 and now read on this thread that it could be made LibreDrive-compatible but couldn't find more info about how to do it on the forum. Dont need UHD capability yet, so the drive would still be ok for me as long as I could get LibreDrive on it.