I had the same problem also with the horns hitting the canopy......but found out from a Align pilot that the servo's were in upside down. If you look at the servo in the picture RBCCONT has put up, you can read the servo name. Also notice that the output shaft is off center (more to the top). If you take the servo out and rotate it 180 degrees then the output shaft is closer to the bottom.this will also make your linkages slope a little down in the front to compensate for the output shaft being lower. This is how they are supposed to be installed, but one would ever think the manual would tell us this. You should never have to modify the canopy to get this to work.