This is a great help for creating custom grids. I agree that modders categories aren't necessary but you often have to edit the brand names in those mods so they reflect the proper brands. How are you determing the races series like F1, IMSA etc.? I would like to see additional series like CanAm, TransAm, Nascar, Blancpain, etc. I add those tags to my cars metadata in CM. Can I add that to the UI or is that something you can do in a future update?
To get more cars into the Le Mans category you have to tag them either 24h, lmp or they must have the class: 24h, lmp or name have to contain 24h Le Mans, LMP.
Hope this helps.
I can put GTE cars also in the definition for next update, if needed/wanted... :)