Here's a simple way to reinforce the pivot hole and distribute the load better for the front control surface.
View attachment 96923
Can be set up parametrically for different thickness of foamboard and different diameter skewer/pivot rod. Could also come in handy for reinforcing the skewer holes on planes with rubber band mounts....
That would be very handy for all us canard builders! Do you have it posted on Thingiverse or Onshape or somewhere?