Gord, these servos are in a RTF from Megatech (I know - Mega'junk' is one of the nicer names I've heard them called, and it seems appropriate). It also has a circuit board, for lack of a better term. I don't see an ESC or receiver, as such; everything plugs into the board. Prolly some proprietary (sp?) deal. Not sure what all those wires are for. Mega-weird. Bil