I don't pay attention to the tachometer , I tap launch so therefore I only pay attention to the colored lights. The countdown lights , the dots above tachometer and the Launch button , I pay attention for those to light up. Soon as last light , lights up for every car , I tap launch from there. Only time I look at tachometer is when someone ask me for shift points , back then I use to tell people the colored dot , right above tachometer to launch at. And never thought about simply telling them the rpm within tachometer. Paying attention to the tachometer causes me to miss perfect shift , but when paying attention to the colored dots right above tachometer , I do much better.
I share this , possibly to help you guys play better.