Sigron,
by
.. using two servos in other planes ans seeing that it is so easy to setup and performs better.
I ment the two servos perform better than 1 servo not changing aileron differential. Yes the 4* has aileron differential with single servo as the torque rods are angled. But for the performance I really don't think it will matter in a 4* or I could really tell the difference either; let me correct my statement, setting up 2 aileron is easier.
For adjusting the aileron differential not that I am going to attend IMAC or pattern contest with 4* but I lke to experiment move CG change thrust angle adjust play with it. I am a condisrably new flier was messing with one of those trim charts and working on the ailron differential when I wrote that reply.