Channel map/file/xl sheet

Hi good people.
Just wondering if anyone had an example of their channel count tracking spreadsheet thingy... I'm (hoping to) expand my 24 channel count this year, and have at least 1000 pixel nodes to add and map. Massive jump for me from DMX to e1.31, and hoping it all comes together for me, but I'm getting lost in how to segregate channels/universes and aligning to the actual props they attach to.

eg, I have 6 arches, each with 75 pixel strip nodes, so each arch would be 225 channels, and I could put 2 arches in a universe... but mapping that, and knowing where to start and resume channel numbering, is hurting my head.

Thanks in advance

This is my Spreadsheet, Most probably need to add additional info , but will get around to it eventually
https://www.dropbox.com/s/glyuhofljtxx05g/Christmas%20Spreadsheet.xlsx?dl=0

I am trying to make each object or set of the same object types a universe. To manage it.

This gives me a great starting point and hopefully puts a few questions I have to rest. Thanks Andrew.