I'm not getting the S-2, switch (IOC). Course lock and Home Lock????? the manual don't tell when or how you use it. Do you flip it all the way down and then it flies back to the "home" location? What does the middle "course" switch do? And the S-1 switch has two Attitude (ATTI) positions, both are the same? Top is GPS and the middle and bottom are manual modes? Thank you for looking.