It's been a long few days, but I made a tracking spreadsheet for ultimate parts that calculates drop rate from boxes, what upgrades are possible, what's needed for the next upgrade, and the one after that. If anyone else is interested in it, you're welcome to it.
Both versions are now clear of known issues.
Excel: https://www.dropbox.com/s/re275ntwtsvnssm/CATS UL Parts Tracker 1.0 by Aaroneous.xlsx?dl=0
Google Sheets Version (Make a copy for yourself... any data you put in this will be deleted): https://docs.google.com/spreadsheets/d/1KvnAxgEVdMZnMhsK5FXQS9ABNLuMCYxdZqjMqzh7mK4/edit?usp=sharing