Would it be possible to add the Evo VI to 2000cc as well as group A and have the S4 in both too so people can choose to use them in either and specify what's available in leagues if for example they wanted to make an early 2000s league with the S4, S7, Evo VI, 206, and Focus 01. Just tell people what they can and can't use.
Maybe don't even add them for AI just for the players to save work.
This way no leaderboards need to be adjusted or have times removed.
Probably some really good reasons why this can't be done just an idea 😅