i would like to know how or what i need to  do   or buy   to   change my  radio system  24 ghz lactic tx440 which was for  electric flight with esc and 3cell batt . i want to use on a new plane required for a os max 15   how do  i fire up the servos  wiithout the esc and the 3 cell batt . i was told i would need another receiver , dont know how this is done    new to nitro  would appreciate the info