Additionally...
If my current matrix needs to use two hubs with two universes, I see two options...
1. Max out hub one and use all 4096 channels and then use 608 channels from the second hub (set to a second universe of course).
2. or simply split them evenly between two hubs.
The problem I see with two hubs is no matter what there will be some "wasted" channels which isn't good because I only have the Advanced Edition of LSP and limited to 8K channels. Wasting channels isn't a good thing. So here is my last question. To save "channels" and using my first option as an example...Can I use a third hub set to the second universe and have SSC's attached to it that have channel Number set above 608? Will there be a conflict between the 2nd and 3rd hubs using the same universe settings?
I don't see a problem with a duplicate hub, in fact I plan to do the same thing with a Zeus for my mega. My Zeus will be set to same universe as my 2nd hub (No2). I can really see a benefit to 2 hubs set to same universe to minimize cable runs, easy of install, etc... For some reason knowing the pixelnet data stream consists of all 4 universes helped this stuff click for me. The hub universe is selected by using the jumpers. The SS system is nothing like DMX and I think that's good thing.
Also, you are ridiculously close to being able to use a 4 port (512ch) to cover those 608 channels.
Personally I think with a matrix that big, no one will notice 608 missing channels... It would be cheaper, easier to install, program, etc. but that's me. Gotta give you credit, dedicating half of your channels to a matrix!