Parasound Zphono: a very brief review

Hope someone is still interested in the ZPhono USB. I'm looking under the hood right now and I'm seeing five TI LF353's, 3 JRC 5532's, 1 JRC 4558 and 1 BB OPA2134. I want to try Burston V5i's or V6's if/where the V6 might fit). But that's a lot of audio op amps and I can't be certain of what is used for what. I'm pretty sure the 2 very symetrical LF353 circuits with a lot of small block-shaped bright yellow caps in the right front corner are the phono pre itself, but which of the many others are the output buffers, headphone amp, drivers to the USB ADC, etc? A board layout diagram and/or schematic would really help.