Modding a Oppo 103

I recently bought a used Oppo 103 from the Bay to tinker with a few SACDs of jazz albums I couldn't find on Tidal or Qobuz. This was a deliberate purchase as I wanted to use the HDMI out into my Bryston BDA3 DAC. While the HDMI route works and plays back native DSD, I'm wondering whether the Oppo can be improved. I've read some older posts on various audio sites about modding the PSU that can level up the sound quality. I came across this: OPPOMOD. I was wondering if anyone has experience in this area? More importantly how likely will the sound improve if I'm already bypassing a lot of the Oppo internals and using the Bryston DAC?  

Thanks!