Hi Scott I'm not sure. I'm using the high altitude Inventek ISM300 module and I haven't been able to find the command set for it so I'm not sure if I can
I don't get any voltage on X-1 Pin 9 for power switching, in any circumstance. Options are set to TX Every 150 Sec, and Power Control with a 12 sec delay.
This is an older post though I'm interested to see how you made out. I wanted to do the same thing more or less, and used Pin 8 as a force-waypoint push button