Josh K-
The mod to the P-3A improves the power supply similar to Dan Wrights level 2 signature and then in addition, I redesign the entire analog section. Completely gut it.
What you end-up with will rival the Meitner for redbook playback, assuming you have a good transport.
The mod I do to the DVP-S7700 transport improves the power supply similar to Dan Wrights level 2 mod. Then in addition, I do a digital section rewiring and redesign. This is a perfect mate to the P-3A above, but other transports with similar mods will work as well.