Many of the original Scalextric cars can be fitted with a digital decoder depending on available space within the body shell. Performance of converted cars on a digital system can vary, but enthusiasts have been able to successfully convert a wide range of cars, both from Scalextric and other brands. As use of Scalextric Digital has increased, a community has established itself where users have developed enhanced powerbase functionality, fuel management and timing systems for increased realism. To convert Scalextric Sport into Scalextric Digital requires a digital power base, power supply (transformer), lane changing track (to utilise the full benefits), and digital controllers. In late 2010, Scalextric released a revised six-car digital powerbase, C7042. This powerbase includes a separate screen which aids set up and also displays race information such as lap times. The company worked closely with customers when developing the new system. The result includes features such as yellow flag options for dealing with crashed cars, ghost cars to race against which can run and change lanes automatically, and the ability to race in analogue mode for older models that have not been converted to digital. In Spain, Hornby Scalextric is marketed under the brand "Superslot", as the "Scalextric" brand is owned there by Tecnitoys, whose products are sold internationally under the SCX brand. Whilst there are some common standards, parts of the two ranges, particularly in their digital offerings, are not compatible. Scalextric is typically sold as a set containing enough track to make a circuit, the necessary power supply and throttles and two cars. The cars are usually based on real vehicles from Formula 1, A1 Grand Prix, NASCAR, rallying, touring, or Le Mans, or based on ordinary road going cars. A number of novelty sets have been produced; for example, horse racing sets and 360 degree sets. The latter, produced sporadically since the 1960s, have a specially made guide that enables the car to run back the way it has come by spinning through 180 degrees. Scalextric is controlled with a hand-held plunger, connected by wire to a connector on the set. A set normally has two to six plungers included. Mounted in the track (for each lane) are two metal rails, which for Analogue carry the DC current from the controllers, or for Digital have constant AC current passed through them, in either case picked up by two metal braids or plates on the underside of the racing cars. Since the 1960s, Scalextric have offered TV and film tie-ins, beginning with the now rare and valuable James Bond 007 set featuring an Aston Martin with action features as shown in the film "Goldfinger".