i'm not sure you can blow the reciever like that. in the past and present iv'e hooked up my motor for my batt and vise versa on a old tekin, and just blew the speedo, and i also hooked bad servos up and blew speedo and not reicever, (weird)and yes blew a rooster out with a very low turn motor (long time ago) and my reciever was fine so i don't think your reciever should be bad i could be wrong