I have one of original units in my laptop, but so far only one burn done on it (result was not beautiful so no more burns done).
Drive info (marked difference compared to your unit):
Verbatim DVD+R 16x MCC 004
ImgBurn @ 3.3x, OPC ON
Self-scan looked promising:
PLDS thinks something else about it:
BenQ confirms that it's not a best burn: