Had never heard of SetupGrid until I read this thread (I'm not paying much attention to this forum or LFS much anymore...)
In patch Y all my setups needed changed and I haven't been racing LFS like I was, thus didn't have the time to tweak for the patch. I have downloaded quite a few from Inferno.
Previous to that, through patch X, all of my setups were my own tweaks from clear back before patch P. Or at least when ever that April 2006 tire patch was. Previous to the April 06 update, my sets were mild tweaks from online racers, league racers (way back in the NAL), or Inferno downloads. From the tire update patch and on, I had always worked on what I had to get them to work in later patches until the latest with the RPM change and the clutch/gear change stuff.
I still have to change Inferno sets quite a bit to get them drivable past swapping ends in the first corner. I have to check out this SetupGrid thing.