Hello again Jair.
I was flying my Eurosport in near calm conditions yesterday for the first time. This jet is amazing fun, such a wide flight envelope
The canards are set only for pitch control. They have no effect on roll. Impossible as only one 8411 drives both canards. I do not switch mine for take off and landing. I have mine set to where the instruction state for neutral and the movements set as per instructions and I find that this gave a perfect feel and near perfect trim from new.
The movements are very small I believe 30mm down and 15mm up so I do not see a problem to fly without them, but the agility of this model is half the fun so i would make them work