Chipped two cars with the Slot.It Carrera Decoders and noticed that if you use weather events, which I do, the Car becomes unusable after a weather event. It slows to a point where it will stall on double crossovers and SmartRace cannot redet this speed. I have to use the Carrera CU to reset the speed. Then the next weather event - and it's hosed again.
Seems like the Slot.It decoders do *not* conform to the Carrera protocol.