Thanks. One thing about the big spreadsheet. It doesn't add a lot of information compared to the post; the summary descriptions cover basically all the areas where people live or where there's interesting weird stuff, so the spreadsheet mostly documents lots of additional repeating patterns of 'structural support' and 'airflow' and 'hydroponics' and the like. What it does do is reinforce the completely bonkers scale of the Underworld. Actually scrolling through 5127 rows and absorbing how some 50-level thick zone is only 1% of the total really helps hit home the true size of the thing.