RE: I think I got the wrong ESC... quick question
Just one more thing.
On Futaba servos, the + is red, the - is black, and the signal wire is white.
On JR servos, the + is red, the - is brown, the signal wire is orange.
Airtronics servos and radios do (or did) not have the + lead in the center and can only be used with Futaba or JR after the wires on the plug are interchanged.