At a weekend-long opening, former rally driver Erik Carlsson was on hand to welcome visitors, and to regale them with tales of his racing days.The 83-year-old is an icon in the rallying world.Saabtech WelwynA three-time British RAC Rally winner, Carlsson was born in Trollhattan, Sweden ??? home of Saab itself.He drove Saabs throught his entire driving career, and his subsequent PR work for the com