RE: B400 reassembly question.
Hey Casey,
I have had that happen to to me once. It was after I changed the blade grip from a crash as I remember. What I did was just back them off a bit, a silly millimeter. If you feel they still have good bite in the plastic they should be OK, I have never had one work itself loose. I would also advise you to check the screws you are using. If you did a big tear down there are several screws that "look" like they go there but don't so check that out too.
Can't get into the ESC as I have never had that happen to me.
Good Luck JPee