Sherod,
I believe Joseph changed a chip on the digital board and upgraded the power supply bank ,installed an IEC connector so I could use his power cord. I still have the non modified player and the main difference is in dynamics, midrange and overall soundstage dimensional presentation.
Yep, he knows what he is doing and I encourage you and anyone looking in, to take advantage of his good taste when it comes to modifications. I would luv to send him my amp so he could lower the noise level. I believe this will rock my world alright. Alas, the darn thing weighs more than 50lbs due to all those power caps.