You let decide your engineer decide. He asks you to start out conservatively with a set of the medium rubber and do a few installation laps. After you’ve done what your engineer asked, you head back in and give the all clear to your mechanics. They’ve done an excellent job rebuilding your car. You head back out, ready to do some long stints. You feel the fresh [Renault] engine in the back performing great, but you don’t want to jinx it. Lap by lap, you are steadily improving while...