heres what I can say, program the **** you need, and have FPP enabled so IF you need to edit a perimeter you can, for ex, your hiking with a group of whackers, they have there apx8000 and they say to use 167.855. you dont have that !!! good think you have either A a backpack with a laptop and cables, or B FPP, then you goto your 2-3 FPP zones preconfigured and edit it. I own 1 apx with FPP and i will say it is **** compared to XTS because you CANT! i mean cant add channels, but in astro CPS you get 10000 personalities, apx is far deferent and you can have every other zone have fpp or not, and you dont need 10000 personalities. if you wanna see apx fpp theres videos, maybe ill send some pics in a minute