Hello, as I mentioned in a previous post I am having some strange problems with a movi controller, you can readit on: https://forum.freeflysystems.com/index.php?threads/erratical-binding-movi-controller.13864/ I am more and more convinced that the inevitable answer will be "hardware failure" in one of the two Xbee-Proo S1 modules. and I have some doubts about how to act. 1.- Has anyone changed them??? 2.- Should I change the pair and program the physical addresses of the modules??? 3.- Something else to program or does the rest of the hardware take care of the rest??? Thank you. 4.- Is it possible to replace TX&RX with 900hz Xbee modules??? Thank you.