Development Blog, Grand Prix 1973 Grand Prix BT42 Development: Day 11: Skins and in-game tweaking Posted on April 15, 2021April 15, 2021 by admin 15 Apr Day 11: Car is now in the game, with everything working. 10 skins created, in addition to the original 1973 season skins. Next step: LODs and physics tweaking. Grand Prix 2021 Mod Development: SF 2021 Sound Grand Prix BT42 Development: Day 12: LODs