I am another very satisfied EVS customer.
I had my Oppo BDP 105D for over a year, and, although it sounded very good out of the box when fully broken in, I was looking for improvements, as we in this hobby just do. The stock unit can be a little brash during complicated transitions and generally a little too forward, but still one great unit for $1300! I researched the various companies modding the Oppo 105 and what mods each modder was specifically performing, and costs for best bang for the buck.
I went with Ric Schultz at EVS. His basic mod, a $775.00 upgrade to the stereo output board and transport is what I felt would do the trick, at least for now.
Turn around time was quick. My Oppo was back at home in its position in less than 2 weeks.
Upon playing my go-to music, it was immediately apparent that the bass was much fuller, defined and extended. Not louder, just more present. All other frequencies are more defined, cleaner and just plain easier to listen
to than the stock unit was. One thing to note with this mod, your output voltage will go from 2.2 volts to 1 volt, so you will have less output and need to turn it up a little bit more (15%-20%) than before. But when you get there, it will sound so much better than before the mod.
Ric offers other mods, specifically a linear power supply upgrade, which I will likely have him do when the time comes.