Oh, and to answer your other question:
Also, Is there any reason why I can't rewire four of the pins inside of the Empeg to the Ethernet RX/TX wires so they are also connected to this connector? Such as the Mic wires or maybe the auto serial connector?
I'm sure it's possible, but I can think of a few drawbacks:
1) It'll put the ethernet wiring closer to other wires, therefore increasing the chance for inductive noise. Both ways, too (ethernet noise appearing on the audio outputs and/or other electronic noise making the ethernet connection less reliable). I'm sure if you're careful, you could work around this, though.
2) You would never be able to plug that player into someone else's docking station.
3) You would never be able to plug someone else's player into your docking station.
4) You would be losing the functionality of whatever pins you stole. For instance, if you stole the serial port pins for this purpose, then you would never be able to perform a software upgrade from the docking station.
But if you're willing to live with that, then go for it.
On the other hand, I've just completed a home docking station with docked ethernet, and it doesn't need to use the sled connector at all. My sled connector is still pristine. It was very easy to do, using Jim Hogan's technique illustrated
here. I used hot glue instead of RTV silicone, and it works great and is very reliable. In fact, it was one of the easiest parts of constructing the docking station. The hard part was all the woodworking.