Nice skills there. I see at least 1 opamp replaced and many of the decoupling capacitors have been removed and bypassed.
Supposedly the cap mod you did makes the DAC more stable and of course... gives better sound.
Have you replaced the power filter capacitor ? I've been wanting to do the cap mod and also replace the power filter capacitor with a 2200uF 16V Blackgate on my X-Fi Xtreme Music.
Those 2200uF 16V Blackgate are hard to come by now. I've heard you can replace the power filter capacitor with a Nichicon KG of similar microfarads and same/higher voltage.
BattleTag - Ross#1455