They should work. If you are uneasy, go to the #4 rod and clevises, It will ad a bit of weight, but not that much with such short rods.

One bit of advise. You want your servo arms to be at 90 degrees to the pushrod at netural, not 90 degrees to the servo case. The way they are will result in uneven control surface movement on either side of center. Nice looking setup though.

Don