So one week, its allowed and said to be legal and now they have banned it. What is the FIA playing at? Make a decision and stick with it. Was Lotus going to have that much of an edge with the system?

Makes me wonder which team didn't like the idea and has managed to get it banned? All a bit stupid really. The FIA should clarify these rules before other teams start wasting time investing staff and money on developing their own systems.