I have a plane with CA hinges that is 14 years old and the hinges are still good. But it is not a 3-D plane.

I have used CA hinges on 3-D planes and not had a problem either.

Servo torque is not an issue. The airflow over the surface is putting WAY more strain on the servo than the hinges ever will.

Re: The sawdust issue - Unless you use an exacto knife, you will get sawdust regardless of which type of hinge you use. Even drilling a hole for Robart pinned hinges is liable to leave some sawdust behind. So if that really bothers you, cut slots with an Xacto knife and use CA hinges.