I did rig it briefly as a non oversampling dac just to hear the difference, and the opacity/harshness was gone but so was the upper treble. I did this mod by attaching jumper cables to the leads of R35 and R36, tapping into the output of the dacs before the op amps. The positive lead from each resistor was connected through a 3uF Northcreek cap for DC isolation, then into the interconnect to the preamp. I made no other changes such as removing the op amps.

I would appreciate it if someone who knows more about dac design would look at the link below and tell me if these resistors are the correct place to tap into the dac chip outputs. There's a link to the schematic in this article.

http://www.audiodesignguide.com/DAC/dac5.html