Oppo BDP-103

[Owen Smith]

True,the lack of gapless playback can be annoying, and at least with my 105, I can only play DSD and DXF files through the USB ports, and not through the Ethernet port.

Gapless playback on my 203 is not perfect, sometimes I get a small click on the track transition. I suspect Oppo ceased doing firmware updates before they had gapless properly finished. I know the files are fine, gapless on my Squeezebox Duet was flawless (my server died just before covid and I haven't replaced it so I no longer use my Squeezebox).

 

[mandrix]

I believe before I'd pay a bunch of money for a hardware mod, I'd just jailbreak a unit.
The 203/205 can be done through the usb port.
Unless something has changed, in recent times the 103/105 have to be flashed through the firmware flash port inside the unit. Not hard, a little tedious on the 105 because you have to do some minor disassembly.