Total travel, 3/16" that is. If you have a computer radio that you can set the endpoints than the make the max travel about 3/16" inch in each direction

You be surprised how little it takes to make it turn properly at top speed, maybe as little a a 1/8" So set up the dual rate to maximize control surface travel for landing and takeoffs. And have the race setup with as little control as necessary to get the job done. When your ready to land, chop the power and flip the rates to full for landing and your there.

If your radio allows you set how much each surface travels, than go for more up travel than down. I have only half as much down as up travel. It will make the model seem less squirrelly. And the rudder should only move maybe half as much as the elevator.

Good luck