Dave, right you are, but if you check the first post carefully you'll see the poster is trying to run two airplanes from the same non-computer radio with out having to flip the reversing switch between planes.

On the bright side, it is "only" throttle, so you're not going to launch with something reversed. But some speed controls can kick on the motor if you arm them at high throttle, and that can be dangerious.

If I were you, I'd look at moving the pushrod on the glow throttle servo to the other side of the servo if possible. Maybe putting in a flexible cable or something to allow it to reach. That will solve the problem. Failing that, you might be able to find a "reversed" servo. Back in the days before servo reversing was standard on all radios, every radio company sold "reversed" servos for use when you need something to go the other way, but couldn't move the pushrod. You might be able to find one. For all I know, it's possible that some brands of servos natually work reversed from others these days.

There is also a modification you can make to a servo to make it work backwards. It involves opening it up and removing and re-soldering several of the wires inside, but it is doable.