For most aircraft I will agree that as long as you hinge closely that you will not find too many problems if you are flying the plane for what it was designed.
I think most failures occur when there is sloppy linkage, a large gap and the plane is "over driven".
If you want to add power in a dive, seal the gap, if you want to fly at mach 1, seal the gap.
The important thing is to remember that these really are just little airplanes and they experience the same aerodynamic effects of the big ones.
Learn how to fly it like an "airplane" and also take every precaution you can to avoid losing it.