DragonHeart,

They will work with Futaba equipment as long as the wiring is correct. I not sure, but if I remember right, Sanwa servos may have been wired like older Airtronics servos. If so, you will need to reverse the positive and negative leads in the connector. Like I said, I'm not sure if this is the case. I think if the wire colors are red, black, black then it is Airtronics wiring. If so, reverse the black wire that would be in the middle with the red wire. You will also need to modify the connector if it is an Airtronics.

George