I always start trimming a speed the average speed the plane is stable at... not to fast not to slow. Slow enouph that I can remove my thumbs to set trim without worrying about the plane.

once the plane can fly straight and level hands off then it's a matter of a click here and a click there to fine tune the elevator at the speed I like flying at.

If I have to hold the elevator stick to adjust for speed I would much rather input up elevator instead of down to compensate for throttle adjustments.

Bill