Does anyone know how the sequential manual gearboxes have been implemented and improved over time? From what I know, the system was invented in 1989 by Ferrari for Formula 1, although not all F1 teams implemented the system on their cars until (I think) 1993. What were the shift speeds of these earliest systems, and how did they differ from what we have today, both in F1 and on road cars. I think the first road car to have an SMG system was the Ferrari 355 F1 in 1998. What speed did it shift at? When did the SMG systems first simulate rev matching on downshifts, or have they always done this? Are there any other SMG features or technologies that weren't present on earlier systems?