Sorry to keep rehashing this, but I am tired of having to go down all of my models and change channels because I have added something or found a mistake.

I am adding several models this year and am trying to make my life easier.
How do I keep my outputs of the controllers the same using universe start channel. For example in absolute if my model has say 10 stings @ 100 nodes each and keeping it simple a start channel of 1. String 1 would be Port 1 and channels 1-300, string 2 port 2 channels 301-600 and so on. How does that look in universe? Forgive my ignorance I am sure that this is simple , but I'm not catching on!
Thanks,
Roger