I think that modifying an Oppo is not a good use of resources. For better SQ, better to buy a good DAC, and they are getting better. A good DAC will hopefully have a better power supply, a good femtoclock(s) and a discrete analog section. The Oppo has none of these. At the beginning, use the Oppo spdif or optical output into the DAC and you will hear a clear improvement.
Also, once you modify an Oppo, you'll never sell it.
Eventually you may find, as other have, that there are better ways to get digital streams into your DAC.
Also, once you modify an Oppo, you'll never sell it.
Eventually you may find, as other have, that there are better ways to get digital streams into your DAC.