Dual servo camera trigger

Hi folks,

I want to control two servos independly like a camera trigger. I got one to work nicely, but not the second. I have 2 RC channels 9 and 7 which should control the triggers.
It seems there is no “Camera Trigger 2” function for RC7_OPTION to control the trigger function for the second servo.

CAM1_TYPE = 1
CAM1_SERVO_OFF = 1900
CAM1_SERVO_ON = 1100
CAM1_DURATION = 1.0
RC9_OPTION = 9
CAM2_TYPE = 1
CAM2_SERVO_OFF = 1900
CAM2_SERVO_ON = 1100
CAM2_DURATION = 1.0
RC7_OPTION = ???

Any ideas how to do this?

Thx, Wolferl