I´m finally finishing the setup of a new airframe, wich now has a parachute system released by a servo (almost like this):
https://www.youtube.com/watch?v=XSkEhjy5PLY

Now comes the tricky part: how to setup a good way of activating the parachute from APM?

For now, i have it on channel 6 and APM just passes from rc input to output, so i can only activate it from primary rc control. i don´t want to activate it on a failsafe (sure, RTL is much better for this) but in case of a strange system failure and no rc control i would like to activate easily from mission planner. is there a simple method for this?

By the way, the ropes of my parachute don´t go over the propeller, so even if it keeps spinning, or even still trying to fly, the parachute will stop the plane.

Thanks for any advice on this, Ricardo.