I tie a "San Juan Variation" for the Bluegill here in North Texas (not a ton of trout fishing here).
I use size 10 - 12 TMC 2488H and only tie in the micro chenille to extend past the bend of the hook just a bit less than the width fo the gape. Then I dub a little Super Brite in the thorax area and whip the head.
I have also tied it with the chenille extending equally beyond the bend and the eye with the dubbing in the middle of the hookshank resembling the clitellum.
"Catch 'em all...Put some back!"