The ESC needs to know where the center and end points of the thottle are to program correctly. If you program the ESC first then the reciever the center and end points of the throttle could change and effect the performance of the MM.
I can't decide if its more fun
to make it...
or break it...
Use the MM for power to your Spektrum Rx for binding it
Once you've bound your Rx to the Tx, turn off the MM
Turn on the MM, go full throttle till you hear 4 beeps, then full reverse until 4 beeps and then neutral until 4 beeps
Turn off the MM, turn back on and enjoy
I just did this with mine yesterday...piece of cake