It's mostly mental. Usually when I'd be shitting my pants trying to find the smooth line through 456 some SV on primitive suspension would whip around me on the outside. One day I followed a guy straight out of the pits on dead cold tires, followed him through there, felt like an easy pace, didn't notice any bumps, and the data says that is the fastest I have gone through that section ever. That track bothers me, and it bothers me that it bothers me, because I know at any pace I run it's pretty much all in my head. YMMV.