hey everyone, im new to all this and have just started with the f18 but need help with formulas. i can set them and understand that you need to use a slope but with the heading it is 6 degrees off, i know this is due to true N and mag N but how do i change it so it displays the same as the hud/hsi and if anyone has or knows where i can get some predone formulas for the f18 that would help alot. thanks