Pete, the settings for the composite Kangaroo are +/- 25mm (about 1") travel for the elevator and +/- 20mm (about 3/4") travel for the ailerons. This is comparable to what you are suggesting, but my main concern is when you push the right stick all the way to the corner giving both full travel on the aileron and full travel on the elevator. This causes considerable binding because the travel probably doubles and it will cause damage to the wing if I do not resolve this problem.
My transmitter is set on elevons and the travels are set to the recommended travels. Not sure how to resolve this. Thanks again, Gary