I was experimenting with micro-shock length this last weekend. We usually run on relatively flowing 3-carpet tracks, but this one was a tight, technical 4-carpet track made up of only 180 degree turns (9), and 90 degree turns (7). The car did not want to rotate enough on corner entry and lacked steering on power. Instead of the usual 7.5mm shaft length on the micro shocks, I went down to 7.0mm. The car gained a ton of rotation on corner entry. I was then able to go to a stiffer center spring, in this case a 13.8lb spring from an associated TC7, in order to gain on-power steering. This made it possible to carry more speed into, and through the entire corner. The rear end felt more free at 7.5mm micro shock shaft, but in this specific condition, the 7.0mm shaft was about 0.4s faster over a lap.