I am setting up a nosewheel servo on a y-connector with rudder signal. I need to reverse the nosewheel servo. Can I cross the red and black wires on the nosewheel servo lead to achieve this, or am I forced to use a matchbox?

While I realize I could use another channel and run an offset mix, I am using a 9-channel receiver and all channels are taken (P-38!)

Any other suggestions?