We recommend staying with the same brand of equipment as a general rule as they are a matched set, however there should be no problems in using those servos. The Futaba you will need to shave the tab off and the corners of the plug on the oposite side in order to plug into the JR plug. You will need to shave the tab off of the KO plug as well. The wiring code is correct for both. Older KO equipment you will need to swap the positive (red) and negative (brown) wires.