I just updated the power supply for Pez. I added a large film cap across the Music Rail inputs and changed the location where the noise the Music Rail removes gets dumped.
So far he reports improvements in leading edge details.
I did the same mod to another Music Railed PS and he reports improved high end detail and additional lowering of grit and grunge on the high end and better detail and image for mids.
For customers that have had the Music Rail installed on their power supplies, I will update the mod for no charge, except shipping. This includes Big Red Machine and golfugh.
Others wishing to get Music Rails installed before Christmas had better contact me quickly. The queue is filling up.