Can you confirm if the Duo has the same high input lag bug with some sources (Saturn, Megadrive) that the Edge does?
I went down this road with a DVDO and in the end just bought a new TV. I miss the DVDO’s pan/zoom controls but don’t miss the random extra lag, poor 480p scaling, random lockup’s or the feeling it could break at any moment 😂
I can’t see the ringing on the DVDO at normal viewing distance, besides if you feed it 3x or 4x then it’s much better anyway. If it was randomly locking up though I think you had a faulty unit. There’s plenty of quirks but I’ve never known mine to lock up.