I believe the question was about whether the 3/16" connecting the 2 halves of the elevator is strong and stiff enough. On my .46 size 3d planes with that type elevator the piece connecting the elevator halves is 1/4" HARD wood. If you want to be sure you could replace the 3/16" balsa (if that is what it is) with 1/4" bass wood or similar, or you could laminate a piece of hardwood to the existing setup . Either way seems to require removing the hinges , fixing , replace hinges. Maybe a project for long winter nights.