To use the mixer ( I used one from Jomar ) you'll need a mixer and two servos.
one input from the mixer hooks up to you throttle channel, the other input hooks up to
your #6 channel . then the outputs fron the mixer hook up to your throttle servos.
this works well on my OV-10 though you need a transmitter with an adjustable ch 6 rather than just a switch
you can do this same thing with your transmitter if it has computer mixing.

anyway your throttle stick will control both servos and yur ch 6 allows you to rock back and forth untill the strobing stops.