Quick Question: I used a google-spreadsheet for my calculations, before I decided, I have done this enough times and can use a mod now. In this sheet I calculate my first stage + Boosters under the influence of the Atmosphere at sealevel, which means lower ISP/Thrust. I know it's not correct, but better save than sorry. When i calculate my rocket with KER, I have 300m/s more available at the start. Is it possible to integrate an option for the Delta-V/ISP/Force-Calculation at start?