You can always get a Y-harness with a built in filter that will automaticly reverse the servo you need reverseing, I had to do that with a 5945 servo. If the servo in question is used you may want to have Hitec checked the servo over for you and they can always program the servo wwith the High rate travel you need and reverse it for you. I recently had to send 4 of my 5945 servo's in for a check up when I bought them used. I told them what degree I wanted the end points set at and they gladely did it for me.
Then I just had to reset the low rates in my TX when installed in the plane.
NEDYOB