Yes, the DWU14A is the OEM version of the 510A drive. I have it and it's been working like a charm since I flashed the most current firmware (1.0d at the time). Note, you will have to find a hacked version of the firmware - but I've seen some people have even found a hack that will "trick" the drive into thinking it's the Sony 510A. Theoretically this would let you update your firmware directly from the sony site. Ciao!
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