@geopolitis I love how this is very specific, and yet very helpful to one considering the Pachanko+Diretta combo!
Edit: Most of those using such a nice server will probably have a switch, so very helpful info. I look into Pachanko for over a year and even saw a Mini SE in action without Diretta, and never knew the part that the source (server) has to send signal via ethernet back to the network. It makes more sense the way you described than the diagram often seen at diretta related websites.
Also, by your previous post, it seems you added a second Melco to your system later. How did you find the improvement, if any, on that second switch to the overall sound, which I suppose should be quite fine before that , with the Diretta and all?