I've got a few thousand track miles on the Nitron Singles using Sector 111's spring rates, and I like it a lot. The cornering on track is much better than on the LSS suspension, and I actually find it more comfortable on the street! The Nitrons dampen high frequency stuff less than LSS did, so a lot of the road vibration doesn't make it through, but they resist the lower frequency stuff a lot more, so the car turns in a lot better. Given the size of the springs from S111, the car did get lowered a tiny bit (somewhere a little less than 1cm), which makes scraping the front on driveways even easier.