I just got this exbal for laptop and ppc. In the laptop model i can't seem to figure out how to change the drag function. It does allow me to input BC for differ velocity. I have search everywhere in this program, help section, and website. I haven't got my ppc yet so i haven't got the chance to look at it to see if you can change drag function on it. It not a great big deal I just have done everything with G7.