Listen to this article As the American-owned outfit bids to build on its strong start to the season, it knows that rivals will be working hard to bring developments to their own cars. But team boss Gunther Steiner thinks that there is a lot more scope to extract speed out of the current package, and says it is important that any developments brought to the car do bring a sizeable benefit. “We will bring updates as well, but I always feel like upgrades are overrated,” said Steiner. “People like to hear that you are bringing upgrades, but if you bring upgrades for one, two or three [downforce] points, the part looks different, but what does it actually do? That is important for me. “If you ask an aerodynamicist, they will bring to every grand prix a milli …