Faster AI for the DDM Tsukuba (Full course). They are now more aggressive, use more kerbs and lap a second or two faster depending on the car.
Fast line + hints. As of 2.0 the sidelines are baked in the fast line, delete the previous version side_l and side_r from the track data folder.
You can make a faster/safer AI for your favorite track too. Here's a mini guide on AC AI line improving.