Glad you enjoyed the drive - what a fantastic day to make your first aero journey!
Unjamming the vents I'm not sure? Perhaps a little grease? Perhaps post a pic to show us what you mean?
As for the hot air, I founf there was heat soak from the engine on the s1. Usually most noticable when driving with roof up and windows open. Windows shut no problem and roof down no real issue. I think on mine it was just a pressure difference meaning that air from the engine bay getting pulled through.
If its just coming from the vents then someone else may have an idea about how they are configured and what you can do.
Look forward to seeing some pics soon!
