I want to setup a quick single stock car race with official race length, number of cars, pitstops.... I'm new to GSC and through my limited research I need confirmation on the following: 1. 40 min. Time limit for official RL races? 2. 30 cars (not sure if this is correct)? 3. Pitstops? Do drivers have to make a stop? Thanks for any help and additional info about the official series.