You don't need to set up channels anywhere in XL except in the 'setup' tab where you add your configuration info.
I added my LOR channels (112) and then added the e1.31 channels/universes. Some have suggested creating the LOR channels higher than your actual (like use 500) to give you some additional channels in case of growth later. Since I don't plan to grow my LOR channels, I am ok.
Now if you want to use the preview features in XL, then you will create models for your LOR fixtures and will add the start channels for them, but that does not change the setup information.
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